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Finding the Fourth Proportional to 1,591.66, 2,387.63 and 617.23

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Solution

The fourth proportional to 1,591.66, 2,387.63 and 617.23 is: 925.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.66 : 2,387.63 = 617.23 : x
  2. Step 2: Convert to fraction form
    1,591.66/2,387.63 = 617.23/x
  3. Step 3: Cross multiply
    1,591.66x = 2,387.63 × 617.23
  4. Step 4: Simplify right side
    1,591.66x = 1,473,716.86
  5. Step 5: Solve for x
    x = 1,473,716.86/1,591.66
  6. Step 6: Final answer
    x = 925.90

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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.