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Finding the Fourth Proportional to 1,263.89, 1,744.29 and 766.88

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Solution

The fourth proportional to 1,263.89, 1,744.29 and 766.88 is: 1,058.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,263.89 : 1,744.29 = 766.88 : x
  2. Step 2: Convert to fraction form
    1,263.89/1,744.29 = 766.88/x
  3. Step 3: Cross multiply
    1,263.89x = 1,744.29 × 766.88
  4. Step 4: Simplify right side
    1,263.89x = 1,337,661.12
  5. Step 5: Solve for x
    x = 1,337,661.12/1,263.89
  6. Step 6: Final answer
    x = 1,058.37

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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.