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Finding the Fourth Proportional to 881.61, 1,322.42 and 361.47

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Solution

The fourth proportional to 881.61, 1,322.42 and 361.47 is: 542.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.61 : 1,322.42 = 361.47 : x
  2. Step 2: Convert to fraction form
    881.61/1,322.42 = 361.47/x
  3. Step 3: Cross multiply
    881.61x = 1,322.42 × 361.47
  4. Step 4: Simplify right side
    881.61x = 478,016.66
  5. Step 5: Solve for x
    x = 478,016.66/881.61
  6. Step 6: Final answer
    x = 542.21

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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.