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Finding the Fourth Proportional to 1,591.75, 2,387.79 and 437.50

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Solution

The fourth proportional to 1,591.75, 2,387.79 and 437.50 is: 656.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.75 : 2,387.79 = 437.50 : x
  2. Step 2: Convert to fraction form
    1,591.75/2,387.79 = 437.50/x
  3. Step 3: Cross multiply
    1,591.75x = 2,387.79 × 437.50
  4. Step 4: Simplify right side
    1,591.75x = 1,044,658.13
  5. Step 5: Solve for x
    x = 1,044,658.13/1,591.75
  6. Step 6: Final answer
    x = 656.30

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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.