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Finding the Fourth Proportional to 742.15, 1,024.03 and 443.31

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Solution

The fourth proportional to 742.15, 1,024.03 and 443.31 is: 611.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    742.15 : 1,024.03 = 443.31 : x
  2. Step 2: Convert to fraction form
    742.15/1,024.03 = 443.31/x
  3. Step 3: Cross multiply
    742.15x = 1,024.03 × 443.31
  4. Step 4: Simplify right side
    742.15x = 453,962.74
  5. Step 5: Solve for x
    x = 453,962.74/742.15
  6. Step 6: Final answer
    x = 611.69

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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.