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Finding the Fourth Proportional to 1,253.02, 1,741.12 and 1,239.52

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Solution

The fourth proportional to 1,253.02, 1,741.12 and 1,239.52 is: 1,722.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.02 : 1,741.12 = 1,239.52 : x
  2. Step 2: Convert to fraction form
    1,253.02/1,741.12 = 1,239.52/x
  3. Step 3: Cross multiply
    1,253.02x = 1,741.12 × 1,239.52
  4. Step 4: Simplify right side
    1,253.02x = 2,158,153.06
  5. Step 5: Solve for x
    x = 2,158,153.06/1,253.02
  6. Step 6: Final answer
    x = 1,722.36

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.