Home / 1,647.78-2,471.21-1,127.72

Finding the Fourth Proportional to 1,647.78, 2,471.21 and 1,127.72

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Solution

The fourth proportional to 1,647.78, 2,471.21 and 1,127.72 is: 1,691.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,647.78 : 2,471.21 = 1,127.72 : x
  2. Step 2: Convert to fraction form
    1,647.78/2,471.21 = 1,127.72/x
  3. Step 3: Cross multiply
    1,647.78x = 2,471.21 × 1,127.72
  4. Step 4: Simplify right side
    1,647.78x = 2,786,837.71
  5. Step 5: Solve for x
    x = 2,786,837.71/1,647.78
  6. Step 6: Final answer
    x = 1,691.27

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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.