Home / 1,428.38-2,141.58-698.54

Finding the Fourth Proportional to 1,428.38, 2,141.58 and 698.54

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Solution

The fourth proportional to 1,428.38, 2,141.58 and 698.54 is: 1,047.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.38 : 2,141.58 = 698.54 : x
  2. Step 2: Convert to fraction form
    1,428.38/2,141.58 = 698.54/x
  3. Step 3: Cross multiply
    1,428.38x = 2,141.58 × 698.54
  4. Step 4: Simplify right side
    1,428.38x = 1,495,979.29
  5. Step 5: Solve for x
    x = 1,495,979.29/1,428.38
  6. Step 6: Final answer
    x = 1,047.33

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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.