Home / 1,428.60-2,143.23-454.70

Finding the Fourth Proportional to 1,428.60, 2,143.23 and 454.70

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Solution

The fourth proportional to 1,428.60, 2,143.23 and 454.70 is: 682.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.60 : 2,143.23 = 454.70 : x
  2. Step 2: Convert to fraction form
    1,428.60/2,143.23 = 454.70/x
  3. Step 3: Cross multiply
    1,428.60x = 2,143.23 × 454.70
  4. Step 4: Simplify right side
    1,428.60x = 974,526.68
  5. Step 5: Solve for x
    x = 974,526.68/1,428.60
  6. Step 6: Final answer
    x = 682.16

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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.