Home / 1,428.10-2,142.14-562.40

Finding the Fourth Proportional to 1,428.10, 2,142.14 and 562.40

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Solution

The fourth proportional to 1,428.10, 2,142.14 and 562.40 is: 843.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.10 : 2,142.14 = 562.40 : x
  2. Step 2: Convert to fraction form
    1,428.10/2,142.14 = 562.40/x
  3. Step 3: Cross multiply
    1,428.10x = 2,142.14 × 562.40
  4. Step 4: Simplify right side
    1,428.10x = 1,204,739.54
  5. Step 5: Solve for x
    x = 1,204,739.54/1,428.10
  6. Step 6: Final answer
    x = 843.60

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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.