Home / 1,428.18-2,143.29-1,151.40

Finding the Fourth Proportional to 1,428.18, 2,143.29 and 1,151.40

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Solution

The fourth proportional to 1,428.18, 2,143.29 and 1,151.40 is: 1,727.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.18 : 2,143.29 = 1,151.40 : x
  2. Step 2: Convert to fraction form
    1,428.18/2,143.29 = 1,151.40/x
  3. Step 3: Cross multiply
    1,428.18x = 2,143.29 × 1,151.40
  4. Step 4: Simplify right side
    1,428.18x = 2,467,784.11
  5. Step 5: Solve for x
    x = 2,467,784.11/1,428.18
  6. Step 6: Final answer
    x = 1,727.92

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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.