Home / 1,515.35-2,091.19-885.91

Finding the Fourth Proportional to 1,515.35, 2,091.19 and 885.91

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Solution

The fourth proportional to 1,515.35, 2,091.19 and 885.91 is: 1,222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.35 : 2,091.19 = 885.91 : x
  2. Step 2: Convert to fraction form
    1,515.35/2,091.19 = 885.91/x
  3. Step 3: Cross multiply
    1,515.35x = 2,091.19 × 885.91
  4. Step 4: Simplify right side
    1,515.35x = 1,852,606.13
  5. Step 5: Solve for x
    x = 1,852,606.13/1,515.35
  6. Step 6: Final answer
    x = 1,222.56

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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.