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Finding the Fourth Proportional to 758.12, 1,046.12 and 443.43

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Solution

The fourth proportional to 758.12, 1,046.12 and 443.43 is: 611.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.12 : 1,046.12 = 443.43 : x
  2. Step 2: Convert to fraction form
    758.12/1,046.12 = 443.43/x
  3. Step 3: Cross multiply
    758.12x = 1,046.12 × 443.43
  4. Step 4: Simplify right side
    758.12x = 463,878.77
  5. Step 5: Solve for x
    x = 463,878.77/758.12
  6. Step 6: Final answer
    x = 611.88

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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.