Home / 1,428.26-2,142.40-454.46

Finding the Fourth Proportional to 1,428.26, 2,142.40 and 454.46

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Solution

The fourth proportional to 1,428.26, 2,142.40 and 454.46 is: 681.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.26 : 2,142.40 = 454.46 : x
  2. Step 2: Convert to fraction form
    1,428.26/2,142.40 = 454.46/x
  3. Step 3: Cross multiply
    1,428.26x = 2,142.40 × 454.46
  4. Step 4: Simplify right side
    1,428.26x = 973,635.10
  5. Step 5: Solve for x
    x = 973,635.10/1,428.26
  6. Step 6: Final answer
    x = 681.69

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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.