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Finding the Fourth Proportional to 871.01, 1,201.81 and 552.08

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Solution

The fourth proportional to 871.01, 1,201.81 and 552.08 is: 761.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    871.01 : 1,201.81 = 552.08 : x
  2. Step 2: Convert to fraction form
    871.01/1,201.81 = 552.08/x
  3. Step 3: Cross multiply
    871.01x = 1,201.81 × 552.08
  4. Step 4: Simplify right side
    871.01x = 663,487.88
  5. Step 5: Solve for x
    x = 663,487.88/871.01
  6. Step 6: Final answer
    x = 761.74

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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.