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Finding the Fourth Proportional to 888.54, 1,332.78 and 628.91

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Solution

The fourth proportional to 888.54, 1,332.78 and 628.91 is: 943.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    888.54 : 1,332.78 = 628.91 : x
  2. Step 2: Convert to fraction form
    888.54/1,332.78 = 628.91/x
  3. Step 3: Cross multiply
    888.54x = 1,332.78 × 628.91
  4. Step 4: Simplify right side
    888.54x = 838,203.91
  5. Step 5: Solve for x
    x = 838,203.91/888.54
  6. Step 6: Final answer
    x = 943.34

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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.