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Finding the Fourth Proportional to 962.74, 1,443.36 and 443.08

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Solution

The fourth proportional to 962.74, 1,443.36 and 443.08 is: 664.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    962.74 : 1,443.36 = 443.08 : x
  2. Step 2: Convert to fraction form
    962.74/1,443.36 = 443.08/x
  3. Step 3: Cross multiply
    962.74x = 1,443.36 × 443.08
  4. Step 4: Simplify right side
    962.74x = 639,523.95
  5. Step 5: Solve for x
    x = 639,523.95/962.74
  6. Step 6: Final answer
    x = 664.27

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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.