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Finding the Fourth Proportional to 1,253.31, 1,729.77 and 756.02

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Solution

The fourth proportional to 1,253.31, 1,729.77 and 756.02 is: 1,043.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,253.31 : 1,729.77 = 756.02 : x
  2. Step 2: Convert to fraction form
    1,253.31/1,729.77 = 756.02/x
  3. Step 3: Cross multiply
    1,253.31x = 1,729.77 × 756.02
  4. Step 4: Simplify right side
    1,253.31x = 1,307,740.84
  5. Step 5: Solve for x
    x = 1,307,740.84/1,253.31
  6. Step 6: Final answer
    x = 1,043.43

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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.