Home / 1,515.19-2,091.53-885.92

Finding the Fourth Proportional to 1,515.19, 2,091.53 and 885.92

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Solution

The fourth proportional to 1,515.19, 2,091.53 and 885.92 is: 1,222.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.19 : 2,091.53 = 885.92 : x
  2. Step 2: Convert to fraction form
    1,515.19/2,091.53 = 885.92/x
  3. Step 3: Cross multiply
    1,515.19x = 2,091.53 × 885.92
  4. Step 4: Simplify right side
    1,515.19x = 1,852,937.66
  5. Step 5: Solve for x
    x = 1,852,937.66/1,515.19
  6. Step 6: Final answer
    x = 1,222.91

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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.