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Finding the Fourth Proportional to 457,874.80, 686,812.20 and 308,575.60

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Solution

The fourth proportional to 457,874.80, 686,812.20 and 308,575.60 is: 462,863.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,874.80 : 686,812.20 = 308,575.60 : x
  2. Step 2: Convert to fraction form
    457,874.80/686,812.20 = 308,575.60/x
  3. Step 3: Cross multiply
    457,874.80x = 686,812.20 × 308,575.60
  4. Step 4: Simplify right side
    457,874.80x = 211,933,486,702.32
  5. Step 5: Solve for x
    x = 211,933,486,702.32/457,874.80
  6. Step 6: Final answer
    x = 462,863.40

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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.