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Finding the Fourth Proportional to 882.03, 1,217.20 and 489.06

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Solution

The fourth proportional to 882.03, 1,217.20 and 489.06 is: 674.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.03 : 1,217.20 = 489.06 : x
  2. Step 2: Convert to fraction form
    882.03/1,217.20 = 489.06/x
  3. Step 3: Cross multiply
    882.03x = 1,217.20 × 489.06
  4. Step 4: Simplify right side
    882.03x = 595,275.30
  5. Step 5: Solve for x
    x = 595,275.30/882.03
  6. Step 6: Final answer
    x = 674.89

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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.