Home / 2,288.80-3,158.40-1,357.12

Finding the Fourth Proportional to 2,288.80, 3,158.40 and 1,357.12

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Solution

The fourth proportional to 2,288.80, 3,158.40 and 1,357.12 is: 1,872.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,288.80 : 3,158.40 = 1,357.12 : x
  2. Step 2: Convert to fraction form
    2,288.80/3,158.40 = 1,357.12/x
  3. Step 3: Cross multiply
    2,288.80x = 3,158.40 × 1,357.12
  4. Step 4: Simplify right side
    2,288.80x = 4,286,327.81
  5. Step 5: Solve for x
    x = 4,286,327.81/2,288.80
  6. Step 6: Final answer
    x = 1,872.74

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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.