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Finding the Fourth Proportional to 1,040.73, 1,561.07 and 347.75

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Solution

The fourth proportional to 1,040.73, 1,561.07 and 347.75 is: 521.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,040.73 : 1,561.07 = 347.75 : x
  2. Step 2: Convert to fraction form
    1,040.73/1,561.07 = 347.75/x
  3. Step 3: Cross multiply
    1,040.73x = 1,561.07 × 347.75
  4. Step 4: Simplify right side
    1,040.73x = 542,852.55
  5. Step 5: Solve for x
    x = 542,852.55/1,040.73
  6. Step 6: Final answer
    x = 521.61

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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.