Home / 1,615.11-2,228.88-985.56

Finding the Fourth Proportional to 1,615.11, 2,228.88 and 985.56

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Solution

The fourth proportional to 1,615.11, 2,228.88 and 985.56 is: 1,360.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,615.11 : 2,228.88 = 985.56 : x
  2. Step 2: Convert to fraction form
    1,615.11/2,228.88 = 985.56/x
  3. Step 3: Cross multiply
    1,615.11x = 2,228.88 × 985.56
  4. Step 4: Simplify right side
    1,615.11x = 2,196,694.97
  5. Step 5: Solve for x
    x = 2,196,694.97/1,615.11
  6. Step 6: Final answer
    x = 1,360.09

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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.