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Finding the Fourth Proportional to 882.21, 1,217.46 and 489.24

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Solution

The fourth proportional to 882.21, 1,217.46 and 489.24 is: 675.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.21 : 1,217.46 = 489.24 : x
  2. Step 2: Convert to fraction form
    882.21/1,217.46 = 489.24/x
  3. Step 3: Cross multiply
    882.21x = 1,217.46 × 489.24
  4. Step 4: Simplify right side
    882.21x = 595,630.13
  5. Step 5: Solve for x
    x = 595,630.13/882.21
  6. Step 6: Final answer
    x = 675.16

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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.