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Finding the Fourth Proportional to 697.66, 962.78 and 387.16

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Solution

The fourth proportional to 697.66, 962.78 and 387.16 is: 534.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.66 : 962.78 = 387.16 : x
  2. Step 2: Convert to fraction form
    697.66/962.78 = 387.16/x
  3. Step 3: Cross multiply
    697.66x = 962.78 × 387.16
  4. Step 4: Simplify right side
    697.66x = 372,749.90
  5. Step 5: Solve for x
    x = 372,749.90/697.66
  6. Step 6: Final answer
    x = 534.29

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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.