Home / 1,428.85-2,143.27-454.95

Finding the Fourth Proportional to 1,428.85, 2,143.27 and 454.95

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Solution

The fourth proportional to 1,428.85, 2,143.27 and 454.95 is: 682.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.85 : 2,143.27 = 454.95 : x
  2. Step 2: Convert to fraction form
    1,428.85/2,143.27 = 454.95/x
  3. Step 3: Cross multiply
    1,428.85x = 2,143.27 × 454.95
  4. Step 4: Simplify right side
    1,428.85x = 975,080.69
  5. Step 5: Solve for x
    x = 975,080.69/1,428.85
  6. Step 6: Final answer
    x = 682.42

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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.