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Finding the Fourth Proportional to 758.32, 1,046.40 and 447.76

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Solution

The fourth proportional to 758.32, 1,046.40 and 447.76 is: 617.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.32 : 1,046.40 = 447.76 : x
  2. Step 2: Convert to fraction form
    758.32/1,046.40 = 447.76/x
  3. Step 3: Cross multiply
    758.32x = 1,046.40 × 447.76
  4. Step 4: Simplify right side
    758.32x = 468,536.06
  5. Step 5: Solve for x
    x = 468,536.06/758.32
  6. Step 6: Final answer
    x = 617.86

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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.