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Finding the Fourth Proportional to 1,003.76, 1,504.12 and 677.92

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Solution

The fourth proportional to 1,003.76, 1,504.12 and 677.92 is: 1,015.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,003.76 : 1,504.12 = 677.92 : x
  2. Step 2: Convert to fraction form
    1,003.76/1,504.12 = 677.92/x
  3. Step 3: Cross multiply
    1,003.76x = 1,504.12 × 677.92
  4. Step 4: Simplify right side
    1,003.76x = 1,019,673.03
  5. Step 5: Solve for x
    x = 1,019,673.03/1,003.76
  6. Step 6: Final answer
    x = 1,015.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.