Home / 2,278.14-3,145.86-1,440.36

Finding the Fourth Proportional to 2,278.14, 3,145.86 and 1,440.36

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Solution

The fourth proportional to 2,278.14, 3,145.86 and 1,440.36 is: 1,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,278.14 : 3,145.86 = 1,440.36 : x
  2. Step 2: Convert to fraction form
    2,278.14/3,145.86 = 1,440.36/x
  3. Step 3: Cross multiply
    2,278.14x = 3,145.86 × 1,440.36
  4. Step 4: Simplify right side
    2,278.14x = 4,531,170.91
  5. Step 5: Solve for x
    x = 4,531,170.91/2,278.14
  6. Step 6: Final answer
    x = 1,988.98

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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.