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Finding the Fourth Proportional to 1,040.08, 1,560.42 and 694.82

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Solution

The fourth proportional to 1,040.08, 1,560.42 and 694.82 is: 1,042.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.08 : 1,560.42 = 694.82 : x
  2. Step 2: Convert to fraction form
    1,040.08/1,560.42 = 694.82/x
  3. Step 3: Cross multiply
    1,040.08x = 1,560.42 × 694.82
  4. Step 4: Simplify right side
    1,040.08x = 1,084,211.02
  5. Step 5: Solve for x
    x = 1,084,211.02/1,040.08
  6. Step 6: Final answer
    x = 1,042.43

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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.