Home / 1,451.88-2,176.56-721.08

Finding the Fourth Proportional to 1,451.88, 2,176.56 and 721.08

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Solution

The fourth proportional to 1,451.88, 2,176.56 and 721.08 is: 1,080.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.88 : 2,176.56 = 721.08 : x
  2. Step 2: Convert to fraction form
    1,451.88/2,176.56 = 721.08/x
  3. Step 3: Cross multiply
    1,451.88x = 2,176.56 × 721.08
  4. Step 4: Simplify right side
    1,451.88x = 1,569,473.88
  5. Step 5: Solve for x
    x = 1,569,473.88/1,451.88
  6. Step 6: Final answer
    x = 1,080.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.