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Finding the Fourth Proportional to 587.40, 879.44 and 382.20

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Solution

The fourth proportional to 587.40, 879.44 and 382.20 is: 572.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.40 : 879.44 = 382.20 : x
  2. Step 2: Convert to fraction form
    587.40/879.44 = 382.20/x
  3. Step 3: Cross multiply
    587.40x = 879.44 × 382.20
  4. Step 4: Simplify right side
    587.40x = 336,121.97
  5. Step 5: Solve for x
    x = 336,121.97/587.40
  6. Step 6: Final answer
    x = 572.22

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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.