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Finding the Fourth Proportional to 678.60, 935.82 and 531.18

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Solution

The fourth proportional to 678.60, 935.82 and 531.18 is: 732.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.60 : 935.82 = 531.18 : x
  2. Step 2: Convert to fraction form
    678.60/935.82 = 531.18/x
  3. Step 3: Cross multiply
    678.60x = 935.82 × 531.18
  4. Step 4: Simplify right side
    678.60x = 497,088.87
  5. Step 5: Solve for x
    x = 497,088.87/678.60
  6. Step 6: Final answer
    x = 732.52

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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.