Home / 3,115.40-4,299.78-2,368.18

Finding the Fourth Proportional to 3,115.40, 4,299.78 and 2,368.18

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Solution

The fourth proportional to 3,115.40, 4,299.78 and 2,368.18 is: 3,268.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.40 : 4,299.78 = 2,368.18 : x
  2. Step 2: Convert to fraction form
    3,115.40/4,299.78 = 2,368.18/x
  3. Step 3: Cross multiply
    3,115.40x = 4,299.78 × 2,368.18
  4. Step 4: Simplify right side
    3,115.40x = 10,182,653.00
  5. Step 5: Solve for x
    x = 10,182,653.00/3,115.40
  6. Step 6: Final answer
    x = 3,268.49

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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.