Home / 2,079.45-2,870-1,240.20

Finding the Fourth Proportional to 2,079.45, 2,870 and 1,240.20

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Solution

The fourth proportional to 2,079.45, 2,870 and 1,240.20 is: 1,711.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,079.45 : 2,870 = 1,240.20 : x
  2. Step 2: Convert to fraction form
    2,079.45/2,870 = 1,240.20/x
  3. Step 3: Cross multiply
    2,079.45x = 2,870 × 1,240.20
  4. Step 4: Simplify right side
    2,079.45x = 3,559,374
  5. Step 5: Solve for x
    x = 3,559,374/2,079.45
  6. Step 6: Final answer
    x = 1,711.69

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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.