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Finding the Fourth Proportional to 860.27, 1,187.17 and 467.29

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Solution

The fourth proportional to 860.27, 1,187.17 and 467.29 is: 644.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    860.27 : 1,187.17 = 467.29 : x
  2. Step 2: Convert to fraction form
    860.27/1,187.17 = 467.29/x
  3. Step 3: Cross multiply
    860.27x = 1,187.17 × 467.29
  4. Step 4: Simplify right side
    860.27x = 554,752.67
  5. Step 5: Solve for x
    x = 554,752.67/860.27
  6. Step 6: Final answer
    x = 644.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.