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Finding the Fourth Proportional to 1,138.97, 1,707.71 and 552.83

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Solution

The fourth proportional to 1,138.97, 1,707.71 and 552.83 is: 828.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,138.97 : 1,707.71 = 552.83 : x
  2. Step 2: Convert to fraction form
    1,138.97/1,707.71 = 552.83/x
  3. Step 3: Cross multiply
    1,138.97x = 1,707.71 × 552.83
  4. Step 4: Simplify right side
    1,138.97x = 944,062.02
  5. Step 5: Solve for x
    x = 944,062.02/1,138.97
  6. Step 6: Final answer
    x = 828.87

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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.