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Finding the Fourth Proportional to 457,818.80, 686,728.20 and 434,490.80

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Solution

The fourth proportional to 457,818.80, 686,728.20 and 434,490.80 is: 651,736.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,818.80 : 686,728.20 = 434,490.80 : x
  2. Step 2: Convert to fraction form
    457,818.80/686,728.20 = 434,490.80/x
  3. Step 3: Cross multiply
    457,818.80x = 686,728.20 × 434,490.80
  4. Step 4: Simplify right side
    457,818.80x = 298,377,085,000.56
  5. Step 5: Solve for x
    x = 298,377,085,000.56/457,818.80
  6. Step 6: Final answer
    x = 651,736.20

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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.