Home / 1,428.46-2,142.91-454.78

Finding the Fourth Proportional to 1,428.46, 2,142.91 and 454.78

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Solution

The fourth proportional to 1,428.46, 2,142.91 and 454.78 is: 682.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.46 : 2,142.91 = 454.78 : x
  2. Step 2: Convert to fraction form
    1,428.46/2,142.91 = 454.78/x
  3. Step 3: Cross multiply
    1,428.46x = 2,142.91 × 454.78
  4. Step 4: Simplify right side
    1,428.46x = 974,556.83
  5. Step 5: Solve for x
    x = 974,556.83/1,428.46
  6. Step 6: Final answer
    x = 682.24

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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.