Home / 2,309.88-3,187.71-1,315.20

Finding the Fourth Proportional to 2,309.88, 3,187.71 and 1,315.20

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Solution

The fourth proportional to 2,309.88, 3,187.71 and 1,315.20 is: 1,815.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.88 : 3,187.71 = 1,315.20 : x
  2. Step 2: Convert to fraction form
    2,309.88/3,187.71 = 1,315.20/x
  3. Step 3: Cross multiply
    2,309.88x = 3,187.71 × 1,315.20
  4. Step 4: Simplify right side
    2,309.88x = 4,192,476.19
  5. Step 5: Solve for x
    x = 4,192,476.19/2,309.88
  6. Step 6: Final answer
    x = 1,815.02

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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.