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Finding the Fourth Proportional to 1,422.31, 2,134.43 and 497.87

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Solution

The fourth proportional to 1,422.31, 2,134.43 and 497.87 is: 747.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.31 : 2,134.43 = 497.87 : x
  2. Step 2: Convert to fraction form
    1,422.31/2,134.43 = 497.87/x
  3. Step 3: Cross multiply
    1,422.31x = 2,134.43 × 497.87
  4. Step 4: Simplify right side
    1,422.31x = 1,062,668.66
  5. Step 5: Solve for x
    x = 1,062,668.66/1,422.31
  6. Step 6: Final answer
    x = 747.14

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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.