Home / 2,309.78-3,187.56-1,315.19

Finding the Fourth Proportional to 2,309.78, 3,187.56 and 1,315.19

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Solution

The fourth proportional to 2,309.78, 3,187.56 and 1,315.19 is: 1,815.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.78 : 3,187.56 = 1,315.19 : x
  2. Step 2: Convert to fraction form
    2,309.78/3,187.56 = 1,315.19/x
  3. Step 3: Cross multiply
    2,309.78x = 3,187.56 × 1,315.19
  4. Step 4: Simplify right side
    2,309.78x = 4,192,247.04
  5. Step 5: Solve for x
    x = 4,192,247.04/2,309.78
  6. Step 6: Final answer
    x = 1,815.00

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1.5x scale

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.