Home / 1,428.10-2,142.18-454.24

Finding the Fourth Proportional to 1,428.10, 2,142.18 and 454.24

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Solution

The fourth proportional to 1,428.10, 2,142.18 and 454.24 is: 681.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.10 : 2,142.18 = 454.24 : x
  2. Step 2: Convert to fraction form
    1,428.10/2,142.18 = 454.24/x
  3. Step 3: Cross multiply
    1,428.10x = 2,142.18 × 454.24
  4. Step 4: Simplify right side
    1,428.10x = 973,063.84
  5. Step 5: Solve for x
    x = 973,063.84/1,428.10
  6. Step 6: Final answer
    x = 681.37

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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.