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Finding the Fourth Proportional to 761.78, 1,050.81 and 446.97

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Solution

The fourth proportional to 761.78, 1,050.81 and 446.97 is: 616.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.78 : 1,050.81 = 446.97 : x
  2. Step 2: Convert to fraction form
    761.78/1,050.81 = 446.97/x
  3. Step 3: Cross multiply
    761.78x = 1,050.81 × 446.97
  4. Step 4: Simplify right side
    761.78x = 469,675.29
  5. Step 5: Solve for x
    x = 469,675.29/761.78
  6. Step 6: Final answer
    x = 616.55

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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.