Home / 2,747.40-4,121.10-1,289.40

Finding the Fourth Proportional to 2,747.40, 4,121.10 and 1,289.40

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Solution

The fourth proportional to 2,747.40, 4,121.10 and 1,289.40 is: 1,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.40 : 4,121.10 = 1,289.40 : x
  2. Step 2: Convert to fraction form
    2,747.40/4,121.10 = 1,289.40/x
  3. Step 3: Cross multiply
    2,747.40x = 4,121.10 × 1,289.40
  4. Step 4: Simplify right side
    2,747.40x = 5,313,746.34
  5. Step 5: Solve for x
    x = 5,313,746.34/2,747.40
  6. Step 6: Final answer
    x = 1,934.10

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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.