Home / 457,891.20-686,836.80-120,931.20

Finding the Fourth Proportional to 457,891.20, 686,836.80 and 120,931.20

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Solution

The fourth proportional to 457,891.20, 686,836.80 and 120,931.20 is: 181,396.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,891.20 : 686,836.80 = 120,931.20 : x
  2. Step 2: Convert to fraction form
    457,891.20/686,836.80 = 120,931.20/x
  3. Step 3: Cross multiply
    457,891.20x = 686,836.80 × 120,931.20
  4. Step 4: Simplify right side
    457,891.20x = 83,059,998,428.16
  5. Step 5: Solve for x
    x = 83,059,998,428.16/457,891.20
  6. Step 6: Final answer
    x = 181,396.80

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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.