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Finding the Fourth Proportional to 891.78, 1,337.93 and 632.28

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Solution

The fourth proportional to 891.78, 1,337.93 and 632.28 is: 948.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    891.78 : 1,337.93 = 632.28 : x
  2. Step 2: Convert to fraction form
    891.78/1,337.93 = 632.28/x
  3. Step 3: Cross multiply
    891.78x = 1,337.93 × 632.28
  4. Step 4: Simplify right side
    891.78x = 845,939.69
  5. Step 5: Solve for x
    x = 845,939.69/891.78
  6. Step 6: Final answer
    x = 948.60

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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.