Home / 3,106.88-4,287.56-1,781.00

Finding the Fourth Proportional to 3,106.88, 4,287.56 and 1,781.00

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Solution

The fourth proportional to 3,106.88, 4,287.56 and 1,781.00 is: 2,457.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,106.88 : 4,287.56 = 1,781.00 : x
  2. Step 2: Convert to fraction form
    3,106.88/4,287.56 = 1,781.00/x
  3. Step 3: Cross multiply
    3,106.88x = 4,287.56 × 1,781.00
  4. Step 4: Simplify right side
    3,106.88x = 7,636,122.92
  5. Step 5: Solve for x
    x = 7,636,122.92/3,106.88
  6. Step 6: Final answer
    x = 2,457.81

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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.