Home / 1,253.16-1,729.26-729.18

Finding the Fourth Proportional to 1,253.16, 1,729.26 and 729.18

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Solution

The fourth proportional to 1,253.16, 1,729.26 and 729.18 is: 1,006.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.16 : 1,729.26 = 729.18 : x
  2. Step 2: Convert to fraction form
    1,253.16/1,729.26 = 729.18/x
  3. Step 3: Cross multiply
    1,253.16x = 1,729.26 × 729.18
  4. Step 4: Simplify right side
    1,253.16x = 1,260,941.81
  5. Step 5: Solve for x
    x = 1,260,941.81/1,253.16
  6. Step 6: Final answer
    x = 1,006.21

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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.