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Finding the Fourth Proportional to 766.80, 1,058.32 and 451.92

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Solution

The fourth proportional to 766.80, 1,058.32 and 451.92 is: 623.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.80 : 1,058.32 = 451.92 : x
  2. Step 2: Convert to fraction form
    766.80/1,058.32 = 451.92/x
  3. Step 3: Cross multiply
    766.80x = 1,058.32 × 451.92
  4. Step 4: Simplify right side
    766.80x = 478,275.97
  5. Step 5: Solve for x
    x = 478,275.97/766.80
  6. Step 6: Final answer
    x = 623.73

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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.