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Finding the Fourth Proportional to 871.95, 1,308.92 and 547.50

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Solution

The fourth proportional to 871.95, 1,308.92 and 547.50 is: 821.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.95 : 1,308.92 = 547.50 : x
  2. Step 2: Convert to fraction form
    871.95/1,308.92 = 547.50/x
  3. Step 3: Cross multiply
    871.95x = 1,308.92 × 547.50
  4. Step 4: Simplify right side
    871.95x = 716,630.96
  5. Step 5: Solve for x
    x = 716,630.96/871.95
  6. Step 6: Final answer
    x = 821.87

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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.