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Finding the Fourth Proportional to 767.31, 1,058.87 and 417.99

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Solution

The fourth proportional to 767.31, 1,058.87 and 417.99 is: 576.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    767.31 : 1,058.87 = 417.99 : x
  2. Step 2: Convert to fraction form
    767.31/1,058.87 = 417.99/x
  3. Step 3: Cross multiply
    767.31x = 1,058.87 × 417.99
  4. Step 4: Simplify right side
    767.31x = 442,594.98
  5. Step 5: Solve for x
    x = 442,594.98/767.31
  6. Step 6: Final answer
    x = 576.81

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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.