Home / 1,211,126,520.60-1,816,689,780.90-660,128,491.80

Finding the Fourth Proportional to 1,211,126,520.60, 1,816,689,780.90 and 660,128,491.80

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Solution

The fourth proportional to 1,211,126,520.60, 1,816,689,780.90 and 660,128,491.80 is: 990,192,737.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,126,520.60 : 1,816,689,780.90 = 660,128,491.80 : x
  2. Step 2: Convert to fraction form
    1,211,126,520.60/1,816,689,780.90 = 660,128,491.80/x
  3. Step 3: Cross multiply
    1,211,126,520.60x = 1,816,689,780.90 × 660,128,491.80
  4. Step 4: Simplify right side
    1,211,126,520.60x = 1,199,248,685,133,989,376
  5. Step 5: Solve for x
    x = 1,199,248,685,133,989,376/1,211,126,520.60
  6. Step 6: Final answer
    x = 990,192,737.70

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.