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Finding the Fourth Proportional to 1,350.57, 1,863.87 and 761.28

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Solution

The fourth proportional to 1,350.57, 1,863.87 and 761.28 is: 1,050.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.57 : 1,863.87 = 761.28 : x
  2. Step 2: Convert to fraction form
    1,350.57/1,863.87 = 761.28/x
  3. Step 3: Cross multiply
    1,350.57x = 1,863.87 × 761.28
  4. Step 4: Simplify right side
    1,350.57x = 1,418,926.95
  5. Step 5: Solve for x
    x = 1,418,926.95/1,350.57
  6. Step 6: Final answer
    x = 1,050.61

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1.5x scale

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.