Home / 1,428.89-2,143.53-455.27

Finding the Fourth Proportional to 1,428.89, 2,143.53 and 455.27

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Solution

The fourth proportional to 1,428.89, 2,143.53 and 455.27 is: 682.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.89 : 2,143.53 = 455.27 : x
  2. Step 2: Convert to fraction form
    1,428.89/2,143.53 = 455.27/x
  3. Step 3: Cross multiply
    1,428.89x = 2,143.53 × 455.27
  4. Step 4: Simplify right side
    1,428.89x = 975,874.19
  5. Step 5: Solve for x
    x = 975,874.19/1,428.89
  6. Step 6: Final answer
    x = 682.96

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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.