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Finding the Fourth Proportional to 882.28, 1,321.74 and 637.64

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Solution

The fourth proportional to 882.28, 1,321.74 and 637.64 is: 955.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    882.28 : 1,321.74 = 637.64 : x
  2. Step 2: Convert to fraction form
    882.28/1,321.74 = 637.64/x
  3. Step 3: Cross multiply
    882.28x = 1,321.74 × 637.64
  4. Step 4: Simplify right side
    882.28x = 842,794.29
  5. Step 5: Solve for x
    x = 842,794.29/882.28
  6. Step 6: Final answer
    x = 955.25

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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.