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Finding the Fourth Proportional to 839.97, 1,158.69 and 545.53

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Solution

The fourth proportional to 839.97, 1,158.69 and 545.53 is: 752.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.97 : 1,158.69 = 545.53 : x
  2. Step 2: Convert to fraction form
    839.97/1,158.69 = 545.53/x
  3. Step 3: Cross multiply
    839.97x = 1,158.69 × 545.53
  4. Step 4: Simplify right side
    839.97x = 632,100.16
  5. Step 5: Solve for x
    x = 632,100.16/839.97
  6. Step 6: Final answer
    x = 752.53

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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.