Home / 1,428.26-2,142.41-551.16

Finding the Fourth Proportional to 1,428.26, 2,142.41 and 551.16

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Solution

The fourth proportional to 1,428.26, 2,142.41 and 551.16 is: 826.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.26 : 2,142.41 = 551.16 : x
  2. Step 2: Convert to fraction form
    1,428.26/2,142.41 = 551.16/x
  3. Step 3: Cross multiply
    1,428.26x = 2,142.41 × 551.16
  4. Step 4: Simplify right side
    1,428.26x = 1,180,807.94
  5. Step 5: Solve for x
    x = 1,180,807.94/1,428.26
  6. Step 6: Final answer
    x = 826.75

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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.