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Finding the Fourth Proportional to 915.11, 1,262.68 and 542.10

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Solution

The fourth proportional to 915.11, 1,262.68 and 542.10 is: 748.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    915.11 : 1,262.68 = 542.10 : x
  2. Step 2: Convert to fraction form
    915.11/1,262.68 = 542.10/x
  3. Step 3: Cross multiply
    915.11x = 1,262.68 × 542.10
  4. Step 4: Simplify right side
    915.11x = 684,497.47
  5. Step 5: Solve for x
    x = 684,497.47/915.11
  6. Step 6: Final answer
    x = 748.00

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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.