Home / 3,428.50-5,143.02-1,120

Finding the Fourth Proportional to 3,428.50, 5,143.02 and 1,120

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Solution

The fourth proportional to 3,428.50, 5,143.02 and 1,120 is: 1,680.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,428.50 : 5,143.02 = 1,120 : x
  2. Step 2: Convert to fraction form
    3,428.50/5,143.02 = 1,120/x
  3. Step 3: Cross multiply
    3,428.50x = 5,143.02 × 1,120
  4. Step 4: Simplify right side
    3,428.50x = 5,760,182.40
  5. Step 5: Solve for x
    x = 5,760,182.40/3,428.50
  6. Step 6: Final answer
    x = 1,680.09

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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.