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Finding the Fourth Proportional to 758.45, 1,046.70 and 463.63

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Solution

The fourth proportional to 758.45, 1,046.70 and 463.63 is: 639.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.45 : 1,046.70 = 463.63 : x
  2. Step 2: Convert to fraction form
    758.45/1,046.70 = 463.63/x
  3. Step 3: Cross multiply
    758.45x = 1,046.70 × 463.63
  4. Step 4: Simplify right side
    758.45x = 485,273.97
  5. Step 5: Solve for x
    x = 485,273.97/758.45
  6. Step 6: Final answer
    x = 639.83

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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.