Home / 1,908.42-2,636.20-1,439.88

Finding the Fourth Proportional to 1,908.42, 2,636.20 and 1,439.88

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Solution

The fourth proportional to 1,908.42, 2,636.20 and 1,439.88 is: 1,988.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,908.42 : 2,636.20 = 1,439.88 : x
  2. Step 2: Convert to fraction form
    1,908.42/2,636.20 = 1,439.88/x
  3. Step 3: Cross multiply
    1,908.42x = 2,636.20 × 1,439.88
  4. Step 4: Simplify right side
    1,908.42x = 3,795,811.66
  5. Step 5: Solve for x
    x = 3,795,811.66/1,908.42
  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.