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Finding the Fourth Proportional to 2,800.65, 4,202.37 and 1,240.98

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Solution

The fourth proportional to 2,800.65, 4,202.37 and 1,240.98 is: 1,862.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,800.65 : 4,202.37 = 1,240.98 : x
  2. Step 2: Convert to fraction form
    2,800.65/4,202.37 = 1,240.98/x
  3. Step 3: Cross multiply
    2,800.65x = 4,202.37 × 1,240.98
  4. Step 4: Simplify right side
    2,800.65x = 5,215,057.12
  5. Step 5: Solve for x
    x = 5,215,057.12/2,800.65
  6. Step 6: Final answer
    x = 1,862.09

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1.5x scale

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.