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Finding the Fourth Proportional to 882.50, 1,324.23 and 426.50

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Solution

The fourth proportional to 882.50, 1,324.23 and 426.50 is: 639.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.50 : 1,324.23 = 426.50 : x
  2. Step 2: Convert to fraction form
    882.50/1,324.23 = 426.50/x
  3. Step 3: Cross multiply
    882.50x = 1,324.23 × 426.50
  4. Step 4: Simplify right side
    882.50x = 564,784.10
  5. Step 5: Solve for x
    x = 564,784.10/882.50
  6. Step 6: Final answer
    x = 639.98

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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.