Home / 457,815.40-686,723.10-142,304.20

Finding the Fourth Proportional to 457,815.40, 686,723.10 and 142,304.20

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Solution

The fourth proportional to 457,815.40, 686,723.10 and 142,304.20 is: 213,456.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,815.40 : 686,723.10 = 142,304.20 : x
  2. Step 2: Convert to fraction form
    457,815.40/686,723.10 = 142,304.20/x
  3. Step 3: Cross multiply
    457,815.40x = 686,723.10 × 142,304.20
  4. Step 4: Simplify right side
    457,815.40x = 97,723,581,367.02
  5. Step 5: Solve for x
    x = 97,723,581,367.02/457,815.40
  6. Step 6: Final answer
    x = 213,456.30

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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.