Home / 1,428.14-2,142.22-551.06

Finding the Fourth Proportional to 1,428.14, 2,142.22 and 551.06

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Solution

The fourth proportional to 1,428.14, 2,142.22 and 551.06 is: 826.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.14 : 2,142.22 = 551.06 : x
  2. Step 2: Convert to fraction form
    1,428.14/2,142.22 = 551.06/x
  3. Step 3: Cross multiply
    1,428.14x = 2,142.22 × 551.06
  4. Step 4: Simplify right side
    1,428.14x = 1,180,491.75
  5. Step 5: Solve for x
    x = 1,180,491.75/1,428.14
  6. Step 6: Final answer
    x = 826.59

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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.