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Finding the Fourth Proportional to 889.52, 1,331.95 and 628.11

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Solution

The fourth proportional to 889.52, 1,331.95 and 628.11 is: 940.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.52 : 1,331.95 = 628.11 : x
  2. Step 2: Convert to fraction form
    889.52/1,331.95 = 628.11/x
  3. Step 3: Cross multiply
    889.52x = 1,331.95 × 628.11
  4. Step 4: Simplify right side
    889.52x = 836,606.21
  5. Step 5: Solve for x
    x = 836,606.21/889.52
  6. Step 6: Final answer
    x = 940.51

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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.