Home / 1,761.78-2,637.09-1,239.36

Finding the Fourth Proportional to 1,761.78, 2,637.09 and 1,239.36

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Solution

The fourth proportional to 1,761.78, 2,637.09 and 1,239.36 is: 1,855.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,761.78 : 2,637.09 = 1,239.36 : x
  2. Step 2: Convert to fraction form
    1,761.78/2,637.09 = 1,239.36/x
  3. Step 3: Cross multiply
    1,761.78x = 2,637.09 × 1,239.36
  4. Step 4: Simplify right side
    1,761.78x = 3,268,303.86
  5. Step 5: Solve for x
    x = 3,268,303.86/1,761.78
  6. Step 6: Final answer
    x = 1,855.11

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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.