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Finding the Fourth Proportional to 1,154.91, 1,592.31 and 839.92

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Solution

The fourth proportional to 1,154.91, 1,592.31 and 839.92 is: 1,158.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,154.91 : 1,592.31 = 839.92 : x
  2. Step 2: Convert to fraction form
    1,154.91/1,592.31 = 839.92/x
  3. Step 3: Cross multiply
    1,154.91x = 1,592.31 × 839.92
  4. Step 4: Simplify right side
    1,154.91x = 1,337,413.02
  5. Step 5: Solve for x
    x = 1,337,413.02/1,154.91
  6. Step 6: Final answer
    x = 1,158.02

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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.