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Finding the Fourth Proportional to 444.47, 612.54 and 319.91

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Solution

The fourth proportional to 444.47, 612.54 and 319.91 is: 440.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.47 : 612.54 = 319.91 : x
  2. Step 2: Convert to fraction form
    444.47/612.54 = 319.91/x
  3. Step 3: Cross multiply
    444.47x = 612.54 × 319.91
  4. Step 4: Simplify right side
    444.47x = 195,959.20
  5. Step 5: Solve for x
    x = 195,959.20/444.47
  6. Step 6: Final answer
    x = 440.88

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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.