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Finding the Fourth Proportional to 908.74, 1,253.96 and 554.83

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Solution

The fourth proportional to 908.74, 1,253.96 and 554.83 is: 765.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    908.74 : 1,253.96 = 554.83 : x
  2. Step 2: Convert to fraction form
    908.74/1,253.96 = 554.83/x
  3. Step 3: Cross multiply
    908.74x = 1,253.96 × 554.83
  4. Step 4: Simplify right side
    908.74x = 695,736.37
  5. Step 5: Solve for x
    x = 695,736.37/908.74
  6. Step 6: Final answer
    x = 765.61

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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.