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Finding the Fourth Proportional to 1,354.11, 2,031.90 and 574.55

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Solution

The fourth proportional to 1,354.11, 2,031.90 and 574.55 is: 862.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,354.11 : 2,031.90 = 574.55 : x
  2. Step 2: Convert to fraction form
    1,354.11/2,031.90 = 574.55/x
  3. Step 3: Cross multiply
    1,354.11x = 2,031.90 × 574.55
  4. Step 4: Simplify right side
    1,354.11x = 1,167,428.15
  5. Step 5: Solve for x
    x = 1,167,428.15/1,354.11
  6. Step 6: Final answer
    x = 862.14

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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.