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Finding the Fourth Proportional to 520,743.40, 781,115.10 and 146,766.40

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Solution

The fourth proportional to 520,743.40, 781,115.10 and 146,766.40 is: 220,149.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,743.40 : 781,115.10 = 146,766.40 : x
  2. Step 2: Convert to fraction form
    520,743.40/781,115.10 = 146,766.40/x
  3. Step 3: Cross multiply
    520,743.40x = 781,115.10 × 146,766.40
  4. Step 4: Simplify right side
    520,743.40x = 114,641,451,212.64
  5. Step 5: Solve for x
    x = 114,641,451,212.64/520,743.40
  6. Step 6: Final answer
    x = 220,149.60

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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.