Home / 858,800.10-1,288,200.15-660,123.30

Finding the Fourth Proportional to 858,800.10, 1,288,200.15 and 660,123.30

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Solution

The fourth proportional to 858,800.10, 1,288,200.15 and 660,123.30 is: 990,184.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,800.10 : 1,288,200.15 = 660,123.30 : x
  2. Step 2: Convert to fraction form
    858,800.10/1,288,200.15 = 660,123.30/x
  3. Step 3: Cross multiply
    858,800.10x = 1,288,200.15 × 660,123.30
  4. Step 4: Simplify right side
    858,800.10x = 850,370,934,078.50
  5. Step 5: Solve for x
    x = 850,370,934,078.50/858,800.10
  6. Step 6: Final answer
    x = 990,184.95

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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.