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Finding the Fourth Proportional to 734.60, 1,013.62 and 439.88

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Solution

The fourth proportional to 734.60, 1,013.62 and 439.88 is: 606.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.60 : 1,013.62 = 439.88 : x
  2. Step 2: Convert to fraction form
    734.60/1,013.62 = 439.88/x
  3. Step 3: Cross multiply
    734.60x = 1,013.62 × 439.88
  4. Step 4: Simplify right side
    734.60x = 445,871.17
  5. Step 5: Solve for x
    x = 445,871.17/734.60
  6. Step 6: Final answer
    x = 606.96

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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.