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Finding the Fourth Proportional to 862.22, 1,291.32 and 630.54

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Solution

The fourth proportional to 862.22, 1,291.32 and 630.54 is: 944.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.22 : 1,291.32 = 630.54 : x
  2. Step 2: Convert to fraction form
    862.22/1,291.32 = 630.54/x
  3. Step 3: Cross multiply
    862.22x = 1,291.32 × 630.54
  4. Step 4: Simplify right side
    862.22x = 814,228.91
  5. Step 5: Solve for x
    x = 814,228.91/862.22
  6. Step 6: Final answer
    x = 944.34

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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.