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Finding the Fourth Proportional to 1,008.39, 1,513.17 and 575.85

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Solution

The fourth proportional to 1,008.39, 1,513.17 and 575.85 is: 864.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.39 : 1,513.17 = 575.85 : x
  2. Step 2: Convert to fraction form
    1,008.39/1,513.17 = 575.85/x
  3. Step 3: Cross multiply
    1,008.39x = 1,513.17 × 575.85
  4. Step 4: Simplify right side
    1,008.39x = 871,358.94
  5. Step 5: Solve for x
    x = 871,358.94/1,008.39
  6. Step 6: Final answer
    x = 864.11

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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.