Home / 1,591.30-2,387.88-666.78

Finding the Fourth Proportional to 1,591.30, 2,387.88 and 666.78

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Solution

The fourth proportional to 1,591.30, 2,387.88 and 666.78 is: 1,000.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,591.30 : 2,387.88 = 666.78 : x
  2. Step 2: Convert to fraction form
    1,591.30/2,387.88 = 666.78/x
  3. Step 3: Cross multiply
    1,591.30x = 2,387.88 × 666.78
  4. Step 4: Simplify right side
    1,591.30x = 1,592,190.63
  5. Step 5: Solve for x
    x = 1,592,190.63/1,591.30
  6. Step 6: Final answer
    x = 1,000.56

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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.