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Finding the Fourth Proportional to 766.97, 1,058.40 and 417.65

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Solution

The fourth proportional to 766.97, 1,058.40 and 417.65 is: 576.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.97 : 1,058.40 = 417.65 : x
  2. Step 2: Convert to fraction form
    766.97/1,058.40 = 417.65/x
  3. Step 3: Cross multiply
    766.97x = 1,058.40 × 417.65
  4. Step 4: Simplify right side
    766.97x = 442,040.76
  5. Step 5: Solve for x
    x = 442,040.76/766.97
  6. Step 6: Final answer
    x = 576.35

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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.