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Finding the Fourth Proportional to 873.12, 1,205.48 and 542.04

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Solution

The fourth proportional to 873.12, 1,205.48 and 542.04 is: 748.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    873.12 : 1,205.48 = 542.04 : x
  2. Step 2: Convert to fraction form
    873.12/1,205.48 = 542.04/x
  3. Step 3: Cross multiply
    873.12x = 1,205.48 × 542.04
  4. Step 4: Simplify right side
    873.12x = 653,418.38
  5. Step 5: Solve for x
    x = 653,418.38/873.12
  6. Step 6: Final answer
    x = 748.37

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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.