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Finding the Fourth Proportional to 440.26, 660.62 and 319.52

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Solution

The fourth proportional to 440.26, 660.62 and 319.52 is: 479.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.26 : 660.62 = 319.52 : x
  2. Step 2: Convert to fraction form
    440.26/660.62 = 319.52/x
  3. Step 3: Cross multiply
    440.26x = 660.62 × 319.52
  4. Step 4: Simplify right side
    440.26x = 211,080.55
  5. Step 5: Solve for x
    x = 211,080.55/440.26
  6. Step 6: Final answer
    x = 479.44

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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.