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Finding the Fourth Proportional to 958.79, 1,439.06 and 496.89

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Solution

The fourth proportional to 958.79, 1,439.06 and 496.89 is: 745.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.79 : 1,439.06 = 496.89 : x
  2. Step 2: Convert to fraction form
    958.79/1,439.06 = 496.89/x
  3. Step 3: Cross multiply
    958.79x = 1,439.06 × 496.89
  4. Step 4: Simplify right side
    958.79x = 715,052.04
  5. Step 5: Solve for x
    x = 715,052.04/958.79
  6. Step 6: Final answer
    x = 745.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.