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Finding the Fourth Proportional to 754.45, 1,041.10 and 439.72

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Solution

The fourth proportional to 754.45, 1,041.10 and 439.72 is: 606.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.45 : 1,041.10 = 439.72 : x
  2. Step 2: Convert to fraction form
    754.45/1,041.10 = 439.72/x
  3. Step 3: Cross multiply
    754.45x = 1,041.10 × 439.72
  4. Step 4: Simplify right side
    754.45x = 457,792.49
  5. Step 5: Solve for x
    x = 457,792.49/754.45
  6. Step 6: Final answer
    x = 606.79

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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.