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Finding the Fourth Proportional to 697.61, 962.28 and 501.39

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Solution

The fourth proportional to 697.61, 962.28 and 501.39 is: 691.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.61 : 962.28 = 501.39 : x
  2. Step 2: Convert to fraction form
    697.61/962.28 = 501.39/x
  3. Step 3: Cross multiply
    697.61x = 962.28 × 501.39
  4. Step 4: Simplify right side
    697.61x = 482,477.57
  5. Step 5: Solve for x
    x = 482,477.57/697.61
  6. Step 6: Final answer
    x = 691.61

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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.