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Finding the Fourth Proportional to 861.35, 1,292.03 and 341.12

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Solution

The fourth proportional to 861.35, 1,292.03 and 341.12 is: 511.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    861.35 : 1,292.03 = 341.12 : x
  2. Step 2: Convert to fraction form
    861.35/1,292.03 = 341.12/x
  3. Step 3: Cross multiply
    861.35x = 1,292.03 × 341.12
  4. Step 4: Simplify right side
    861.35x = 440,729.11
  5. Step 5: Solve for x
    x = 440,729.11/861.35
  6. Step 6: Final answer
    x = 511.68

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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.