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Finding the Fourth Proportional to 749.45, 1,034.21 and 417.89

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Solution

The fourth proportional to 749.45, 1,034.21 and 417.89 is: 576.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.45 : 1,034.21 = 417.89 : x
  2. Step 2: Convert to fraction form
    749.45/1,034.21 = 417.89/x
  3. Step 3: Cross multiply
    749.45x = 1,034.21 × 417.89
  4. Step 4: Simplify right side
    749.45x = 432,180.85
  5. Step 5: Solve for x
    x = 432,180.85/749.45
  6. Step 6: Final answer
    x = 576.66

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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.