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Finding the Fourth Proportional to 457,856.80, 686,785.20 and 434,528.80

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Solution

The fourth proportional to 457,856.80, 686,785.20 and 434,528.80 is: 651,793.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,856.80 : 686,785.20 = 434,528.80 : x
  2. Step 2: Convert to fraction form
    457,856.80/686,785.20 = 434,528.80/x
  3. Step 3: Cross multiply
    457,856.80x = 686,785.20 × 434,528.80
  4. Step 4: Simplify right side
    457,856.80x = 298,427,948,813.76
  5. Step 5: Solve for x
    x = 298,427,948,813.76/457,856.80
  6. Step 6: Final answer
    x = 651,793.20

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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.