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Finding the Fourth Proportional to 632.92, 871.55 and 619.29

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Solution

The fourth proportional to 632.92, 871.55 and 619.29 is: 852.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.92 : 871.55 = 619.29 : x
  2. Step 2: Convert to fraction form
    632.92/871.55 = 619.29/x
  3. Step 3: Cross multiply
    632.92x = 871.55 × 619.29
  4. Step 4: Simplify right side
    632.92x = 539,742.20
  5. Step 5: Solve for x
    x = 539,742.20/632.92
  6. Step 6: Final answer
    x = 852.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.