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Finding the Fourth Proportional to 882.29, 1,324.35 and 639.29

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Solution

The fourth proportional to 882.29, 1,324.35 and 639.29 is: 959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.29 : 1,324.35 = 639.29 : x
  2. Step 2: Convert to fraction form
    882.29/1,324.35 = 639.29/x
  3. Step 3: Cross multiply
    882.29x = 1,324.35 × 639.29
  4. Step 4: Simplify right side
    882.29x = 846,647.02
  5. Step 5: Solve for x
    x = 846,647.02/882.29
  6. Step 6: Final answer
    x = 959.60

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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.