Home / 1,261.12-1,740.26-729.76

Finding the Fourth Proportional to 1,261.12, 1,740.26 and 729.76

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Solution

The fourth proportional to 1,261.12, 1,740.26 and 729.76 is: 1,007.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.12 : 1,740.26 = 729.76 : x
  2. Step 2: Convert to fraction form
    1,261.12/1,740.26 = 729.76/x
  3. Step 3: Cross multiply
    1,261.12x = 1,740.26 × 729.76
  4. Step 4: Simplify right side
    1,261.12x = 1,269,972.14
  5. Step 5: Solve for x
    x = 1,269,972.14/1,261.12
  6. Step 6: Final answer
    x = 1,007.02

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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.