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Finding the Fourth Proportional to 659,593.80, 989,390.70 and 210,311.10

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Solution

The fourth proportional to 659,593.80, 989,390.70 and 210,311.10 is: 315,466.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,593.80 : 989,390.70 = 210,311.10 : x
  2. Step 2: Convert to fraction form
    659,593.80/989,390.70 = 210,311.10/x
  3. Step 3: Cross multiply
    659,593.80x = 989,390.70 × 210,311.10
  4. Step 4: Simplify right side
    659,593.80x = 208,079,846,446.77
  5. Step 5: Solve for x
    x = 208,079,846,446.77/659,593.80
  6. Step 6: Final answer
    x = 315,466.65

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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.