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Finding the Fourth Proportional to 815.72, 1,125.77 and 501.03

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Solution

The fourth proportional to 815.72, 1,125.77 and 501.03 is: 691.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    815.72 : 1,125.77 = 501.03 : x
  2. Step 2: Convert to fraction form
    815.72/1,125.77 = 501.03/x
  3. Step 3: Cross multiply
    815.72x = 1,125.77 × 501.03
  4. Step 4: Simplify right side
    815.72x = 564,042.04
  5. Step 5: Solve for x
    x = 564,042.04/815.72
  6. Step 6: Final answer
    x = 691.47

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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.