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Finding the Fourth Proportional to 1,001, 1,380.30 and 734.28

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Solution

The fourth proportional to 1,001, 1,380.30 and 734.28 is: 1,012.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001 : 1,380.30 = 734.28 : x
  2. Step 2: Convert to fraction form
    1,001/1,380.30 = 734.28/x
  3. Step 3: Cross multiply
    1,001x = 1,380.30 × 734.28
  4. Step 4: Simplify right side
    1,001x = 1,013,526.68
  5. Step 5: Solve for x
    x = 1,013,526.68/1,001
  6. Step 6: Final answer
    x = 1,012.51

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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.