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Finding the Fourth Proportional to 1,158, 1,737.04 and 388.48

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Solution

The fourth proportional to 1,158, 1,737.04 and 388.48 is: 582.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,158 : 1,737.04 = 388.48 : x
  2. Step 2: Convert to fraction form
    1,158/1,737.04 = 388.48/x
  3. Step 3: Cross multiply
    1,158x = 1,737.04 × 388.48
  4. Step 4: Simplify right side
    1,158x = 674,805.30
  5. Step 5: Solve for x
    x = 674,805.30/1,158
  6. Step 6: Final answer
    x = 582.73

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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.