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Finding the Fourth Proportional to 1,255.05, 1,731.87 and 730.98

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Solution

The fourth proportional to 1,255.05, 1,731.87 and 730.98 is: 1,008.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.05 : 1,731.87 = 730.98 : x
  2. Step 2: Convert to fraction form
    1,255.05/1,731.87 = 730.98/x
  3. Step 3: Cross multiply
    1,255.05x = 1,731.87 × 730.98
  4. Step 4: Simplify right side
    1,255.05x = 1,265,962.33
  5. Step 5: Solve for x
    x = 1,265,962.33/1,255.05
  6. Step 6: Final answer
    x = 1,008.69

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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.