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Finding the Fourth Proportional to 1,129.90, 1,694.67 and 308.24

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Solution

The fourth proportional to 1,129.90, 1,694.67 and 308.24 is: 462.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.90 : 1,694.67 = 308.24 : x
  2. Step 2: Convert to fraction form
    1,129.90/1,694.67 = 308.24/x
  3. Step 3: Cross multiply
    1,129.90x = 1,694.67 × 308.24
  4. Step 4: Simplify right side
    1,129.90x = 522,356.61
  5. Step 5: Solve for x
    x = 522,356.61/1,129.90
  6. Step 6: Final answer
    x = 462.30

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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.