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Finding the Fourth Proportional to 1,256.61, 1,734.03 and 725.37

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Solution

The fourth proportional to 1,256.61, 1,734.03 and 725.37 is: 1,000.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256.61 : 1,734.03 = 725.37 : x
  2. Step 2: Convert to fraction form
    1,256.61/1,734.03 = 725.37/x
  3. Step 3: Cross multiply
    1,256.61x = 1,734.03 × 725.37
  4. Step 4: Simplify right side
    1,256.61x = 1,257,813.34
  5. Step 5: Solve for x
    x = 1,257,813.34/1,256.61
  6. Step 6: Final answer
    x = 1,000.96

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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.