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Finding the Fourth Proportional to 766.79, 1,058.14 and 417.48

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Solution

The fourth proportional to 766.79, 1,058.14 and 417.48 is: 576.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    766.79 : 1,058.14 = 417.48 : x
  2. Step 2: Convert to fraction form
    766.79/1,058.14 = 417.48/x
  3. Step 3: Cross multiply
    766.79x = 1,058.14 × 417.48
  4. Step 4: Simplify right side
    766.79x = 441,752.29
  5. Step 5: Solve for x
    x = 441,752.29/766.79
  6. Step 6: Final answer
    x = 576.11

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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.