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Finding the Fourth Proportional to 761.52, 1,138.24 and 529.52

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Solution

The fourth proportional to 761.52, 1,138.24 and 529.52 is: 791.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.52 : 1,138.24 = 529.52 : x
  2. Step 2: Convert to fraction form
    761.52/1,138.24 = 529.52/x
  3. Step 3: Cross multiply
    761.52x = 1,138.24 × 529.52
  4. Step 4: Simplify right side
    761.52x = 602,720.84
  5. Step 5: Solve for x
    x = 602,720.84/761.52
  6. Step 6: Final answer
    x = 791.47

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.