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Finding the Fourth Proportional to 1,158.70, 1,737.82 and 542.24

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Solution

The fourth proportional to 1,158.70, 1,737.82 and 542.24 is: 813.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158.70 : 1,737.82 = 542.24 : x
  2. Step 2: Convert to fraction form
    1,158.70/1,737.82 = 542.24/x
  3. Step 3: Cross multiply
    1,158.70x = 1,737.82 × 542.24
  4. Step 4: Simplify right side
    1,158.70x = 942,315.52
  5. Step 5: Solve for x
    x = 942,315.52/1,158.70
  6. Step 6: Final answer
    x = 813.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.