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Finding the Fourth Proportional to 754.55, 1,041.15 and 439.86

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Solution

The fourth proportional to 754.55, 1,041.15 and 439.86 is: 606.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    754.55 : 1,041.15 = 439.86 : x
  2. Step 2: Convert to fraction form
    754.55/1,041.15 = 439.86/x
  3. Step 3: Cross multiply
    754.55x = 1,041.15 × 439.86
  4. Step 4: Simplify right side
    754.55x = 457,960.24
  5. Step 5: Solve for x
    x = 457,960.24/754.55
  6. Step 6: Final answer
    x = 606.93

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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.