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Finding the Fourth Proportional to 867.57, 1,301.35 and 354.57

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Solution

The fourth proportional to 867.57, 1,301.35 and 354.57 is: 531.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.57 : 1,301.35 = 354.57 : x
  2. Step 2: Convert to fraction form
    867.57/1,301.35 = 354.57/x
  3. Step 3: Cross multiply
    867.57x = 1,301.35 × 354.57
  4. Step 4: Simplify right side
    867.57x = 461,411.39
  5. Step 5: Solve for x
    x = 461,411.39/867.57
  6. Step 6: Final answer
    x = 531.85

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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.