Home / 1,441.07-1,988.68-811.62

Finding the Fourth Proportional to 1,441.07, 1,988.68 and 811.62

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Solution

The fourth proportional to 1,441.07, 1,988.68 and 811.62 is: 1,120.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,441.07 : 1,988.68 = 811.62 : x
  2. Step 2: Convert to fraction form
    1,441.07/1,988.68 = 811.62/x
  3. Step 3: Cross multiply
    1,441.07x = 1,988.68 × 811.62
  4. Step 4: Simplify right side
    1,441.07x = 1,614,049.67
  5. Step 5: Solve for x
    x = 1,614,049.67/1,441.07
  6. Step 6: Final answer
    x = 1,120.04

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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.