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Finding the Fourth Proportional to 908.62, 1,253.42 and 740.83

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Solution

The fourth proportional to 908.62, 1,253.42 and 740.83 is: 1,021.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.62 : 1,253.42 = 740.83 : x
  2. Step 2: Convert to fraction form
    908.62/1,253.42 = 740.83/x
  3. Step 3: Cross multiply
    908.62x = 1,253.42 × 740.83
  4. Step 4: Simplify right side
    908.62x = 928,564.30
  5. Step 5: Solve for x
    x = 928,564.30/908.62
  6. Step 6: Final answer
    x = 1,021.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.