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Finding the Fourth Proportional to 678.72, 937.18 and 531.10

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Solution

The fourth proportional to 678.72, 937.18 and 531.10 is: 733.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    678.72 : 937.18 = 531.10 : x
  2. Step 2: Convert to fraction form
    678.72/937.18 = 531.10/x
  3. Step 3: Cross multiply
    678.72x = 937.18 × 531.10
  4. Step 4: Simplify right side
    678.72x = 497,736.30
  5. Step 5: Solve for x
    x = 497,736.30/678.72
  6. Step 6: Final answer
    x = 733.35

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.