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Finding the Fourth Proportional to 842.72, 1,264.10 and 534.15

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Solution

The fourth proportional to 842.72, 1,264.10 and 534.15 is: 801.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    842.72 : 1,264.10 = 534.15 : x
  2. Step 2: Convert to fraction form
    842.72/1,264.10 = 534.15/x
  3. Step 3: Cross multiply
    842.72x = 1,264.10 × 534.15
  4. Step 4: Simplify right side
    842.72x = 675,216.34
  5. Step 5: Solve for x
    x = 675,216.34/842.72
  6. Step 6: Final answer
    x = 801.24

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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.