Home / 1,985.59-2,738.86-1,286.92

Finding the Fourth Proportional to 1,985.59, 2,738.86 and 1,286.92

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Solution

The fourth proportional to 1,985.59, 2,738.86 and 1,286.92 is: 1,775.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,985.59 : 2,738.86 = 1,286.92 : x
  2. Step 2: Convert to fraction form
    1,985.59/2,738.86 = 1,286.92/x
  3. Step 3: Cross multiply
    1,985.59x = 2,738.86 × 1,286.92
  4. Step 4: Simplify right side
    1,985.59x = 3,524,693.71
  5. Step 5: Solve for x
    x = 3,524,693.71/1,985.59
  6. Step 6: Final answer
    x = 1,775.14

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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.