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Finding the Fourth Proportional to 882.32, 1,217.49 and 489.28

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Solution

The fourth proportional to 882.32, 1,217.49 and 489.28 is: 675.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.32 : 1,217.49 = 489.28 : x
  2. Step 2: Convert to fraction form
    882.32/1,217.49 = 489.28/x
  3. Step 3: Cross multiply
    882.32x = 1,217.49 × 489.28
  4. Step 4: Simplify right side
    882.32x = 595,693.51
  5. Step 5: Solve for x
    x = 595,693.51/882.32
  6. Step 6: Final answer
    x = 675.14

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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.