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Finding the Fourth Proportional to 620,288.10, 930,432.15 and 407,711.70

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Solution

The fourth proportional to 620,288.10, 930,432.15 and 407,711.70 is: 611,567.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,288.10 : 930,432.15 = 407,711.70 : x
  2. Step 2: Convert to fraction form
    620,288.10/930,432.15 = 407,711.70/x
  3. Step 3: Cross multiply
    620,288.10x = 930,432.15 × 407,711.70
  4. Step 4: Simplify right side
    620,288.10x = 379,348,073,611.16
  5. Step 5: Solve for x
    x = 379,348,073,611.16/620,288.10
  6. Step 6: Final answer
    x = 611,567.55

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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.