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Finding the Fourth Proportional to 881.52, 1,321.76 and 394.48

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Solution

The fourth proportional to 881.52, 1,321.76 and 394.48 is: 591.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.52 : 1,321.76 = 394.48 : x
  2. Step 2: Convert to fraction form
    881.52/1,321.76 = 394.48/x
  3. Step 3: Cross multiply
    881.52x = 1,321.76 × 394.48
  4. Step 4: Simplify right side
    881.52x = 521,407.88
  5. Step 5: Solve for x
    x = 521,407.88/881.52
  6. Step 6: Final answer
    x = 591.49

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1.5x scale

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.