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Finding the Fourth Proportional to 668.08, 1,002.39 and 359.74

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Solution

The fourth proportional to 668.08, 1,002.39 and 359.74 is: 539.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.08 : 1,002.39 = 359.74 : x
  2. Step 2: Convert to fraction form
    668.08/1,002.39 = 359.74/x
  3. Step 3: Cross multiply
    668.08x = 1,002.39 × 359.74
  4. Step 4: Simplify right side
    668.08x = 360,599.78
  5. Step 5: Solve for x
    x = 360,599.78/668.08
  6. Step 6: Final answer
    x = 539.76

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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.