Home / 1,939.77-2,677.31-1,276.68

Finding the Fourth Proportional to 1,939.77, 2,677.31 and 1,276.68

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Solution

The fourth proportional to 1,939.77, 2,677.31 and 1,276.68 is: 1,762.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,939.77 : 2,677.31 = 1,276.68 : x
  2. Step 2: Convert to fraction form
    1,939.77/2,677.31 = 1,276.68/x
  3. Step 3: Cross multiply
    1,939.77x = 2,677.31 × 1,276.68
  4. Step 4: Simplify right side
    1,939.77x = 3,418,061.75
  5. Step 5: Solve for x
    x = 3,418,061.75/1,939.77
  6. Step 6: Final answer
    x = 1,762.10

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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.