Home / 1,371.84-2,065.20-1,252.80

Finding the Fourth Proportional to 1,371.84, 2,065.20 and 1,252.80

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Solution

The fourth proportional to 1,371.84, 2,065.20 and 1,252.80 is: 1,885.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,371.84 : 2,065.20 = 1,252.80 : x
  2. Step 2: Convert to fraction form
    1,371.84/2,065.20 = 1,252.80/x
  3. Step 3: Cross multiply
    1,371.84x = 2,065.20 × 1,252.80
  4. Step 4: Simplify right side
    1,371.84x = 2,587,282.56
  5. Step 5: Solve for x
    x = 2,587,282.56/1,371.84
  6. Step 6: Final answer
    x = 1,885.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.