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Finding the Fourth Proportional to 887.98, 1,331.76 and 394.12

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Solution

The fourth proportional to 887.98, 1,331.76 and 394.12 is: 591.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    887.98 : 1,331.76 = 394.12 : x
  2. Step 2: Convert to fraction form
    887.98/1,331.76 = 394.12/x
  3. Step 3: Cross multiply
    887.98x = 1,331.76 × 394.12
  4. Step 4: Simplify right side
    887.98x = 524,873.25
  5. Step 5: Solve for x
    x = 524,873.25/887.98
  6. Step 6: Final answer
    x = 591.09

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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.