Home / 2,232.86-3,081.47-1,288.89

Finding the Fourth Proportional to 2,232.86, 3,081.47 and 1,288.89

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Solution

The fourth proportional to 2,232.86, 3,081.47 and 1,288.89 is: 1,778.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,232.86 : 3,081.47 = 1,288.89 : x
  2. Step 2: Convert to fraction form
    2,232.86/3,081.47 = 1,288.89/x
  3. Step 3: Cross multiply
    2,232.86x = 3,081.47 × 1,288.89
  4. Step 4: Simplify right side
    2,232.86x = 3,971,669.42
  5. Step 5: Solve for x
    x = 3,971,669.42/2,232.86
  6. Step 6: Final answer
    x = 1,778.74

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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.