Home / 712,105.38-982,262.79-440,256.42

Finding the Fourth Proportional to 712,105.38, 982,262.79 and 440,256.42

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Solution

The fourth proportional to 712,105.38, 982,262.79 and 440,256.42 is: 607,280.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,105.38 : 982,262.79 = 440,256.42 : x
  2. Step 2: Convert to fraction form
    712,105.38/982,262.79 = 440,256.42/x
  3. Step 3: Cross multiply
    712,105.38x = 982,262.79 × 440,256.42
  4. Step 4: Simplify right side
    712,105.38x = 432,447,499,424.61
  5. Step 5: Solve for x
    x = 432,447,499,424.61/712,105.38
  6. Step 6: Final answer
    x = 607,280.20

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.