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Finding the Fourth Proportional to 1,013.57, 1,519.11 and 807.29

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Solution

The fourth proportional to 1,013.57, 1,519.11 and 807.29 is: 1,209.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,013.57 : 1,519.11 = 807.29 : x
  2. Step 2: Convert to fraction form
    1,013.57/1,519.11 = 807.29/x
  3. Step 3: Cross multiply
    1,013.57x = 1,519.11 × 807.29
  4. Step 4: Simplify right side
    1,013.57x = 1,226,366.11
  5. Step 5: Solve for x
    x = 1,226,366.11/1,013.57
  6. Step 6: Final answer
    x = 1,209.94

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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.