Home / 1,424.38-2,136.51-451.15

Finding the Fourth Proportional to 1,424.38, 2,136.51 and 451.15

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Solution

The fourth proportional to 1,424.38, 2,136.51 and 451.15 is: 676.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,424.38 : 2,136.51 = 451.15 : x
  2. Step 2: Convert to fraction form
    1,424.38/2,136.51 = 451.15/x
  3. Step 3: Cross multiply
    1,424.38x = 2,136.51 × 451.15
  4. Step 4: Simplify right side
    1,424.38x = 963,886.49
  5. Step 5: Solve for x
    x = 963,886.49/1,424.38
  6. Step 6: Final answer
    x = 676.71

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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.