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Finding the Fourth Proportional to 867.70, 1,301.28 and 434.62

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Solution

The fourth proportional to 867.70, 1,301.28 and 434.62 is: 651.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.70 : 1,301.28 = 434.62 : x
  2. Step 2: Convert to fraction form
    867.70/1,301.28 = 434.62/x
  3. Step 3: Cross multiply
    867.70x = 1,301.28 × 434.62
  4. Step 4: Simplify right side
    867.70x = 565,562.31
  5. Step 5: Solve for x
    x = 565,562.31/867.70
  6. Step 6: Final answer
    x = 651.79

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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.