Home / 1,451.89-2,176.65-721.27

Finding the Fourth Proportional to 1,451.89, 2,176.65 and 721.27

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Solution

The fourth proportional to 1,451.89, 2,176.65 and 721.27 is: 1,081.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,451.89 : 2,176.65 = 721.27 : x
  2. Step 2: Convert to fraction form
    1,451.89/2,176.65 = 721.27/x
  3. Step 3: Cross multiply
    1,451.89x = 2,176.65 × 721.27
  4. Step 4: Simplify right side
    1,451.89x = 1,569,952.35
  5. Step 5: Solve for x
    x = 1,569,952.35/1,451.89
  6. Step 6: Final answer
    x = 1,081.32

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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.