Home / 2,079.36-2,870.10-1,239.80

Finding the Fourth Proportional to 2,079.36, 2,870.10 and 1,239.80

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Solution

The fourth proportional to 2,079.36, 2,870.10 and 1,239.80 is: 1,711.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.36 : 2,870.10 = 1,239.80 : x
  2. Step 2: Convert to fraction form
    2,079.36/2,870.10 = 1,239.80/x
  3. Step 3: Cross multiply
    2,079.36x = 2,870.10 × 1,239.80
  4. Step 4: Simplify right side
    2,079.36x = 3,558,335.63
  5. Step 5: Solve for x
    x = 3,558,335.63/2,079.36
  6. Step 6: Final answer
    x = 1,711.26

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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.