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Finding the Fourth Proportional to 881.28, 1,321.74 and 590.58

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Solution

The fourth proportional to 881.28, 1,321.74 and 590.58 is: 885.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.28 : 1,321.74 = 590.58 : x
  2. Step 2: Convert to fraction form
    881.28/1,321.74 = 590.58/x
  3. Step 3: Cross multiply
    881.28x = 1,321.74 × 590.58
  4. Step 4: Simplify right side
    881.28x = 780,593.21
  5. Step 5: Solve for x
    x = 780,593.21/881.28
  6. Step 6: Final answer
    x = 885.75

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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.