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Finding the Fourth Proportional to 749.50, 1,034.32 and 439.18

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Solution

The fourth proportional to 749.50, 1,034.32 and 439.18 is: 606.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.50 : 1,034.32 = 439.18 : x
  2. Step 2: Convert to fraction form
    749.50/1,034.32 = 439.18/x
  3. Step 3: Cross multiply
    749.50x = 1,034.32 × 439.18
  4. Step 4: Simplify right side
    749.50x = 454,252.66
  5. Step 5: Solve for x
    x = 454,252.66/749.50
  6. Step 6: Final answer
    x = 606.07

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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.