Home / 1,243.10-1,862.40-984.80

Finding the Fourth Proportional to 1,243.10, 1,862.40 and 984.80

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Solution

The fourth proportional to 1,243.10, 1,862.40 and 984.80 is: 1,475.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.10 : 1,862.40 = 984.80 : x
  2. Step 2: Convert to fraction form
    1,243.10/1,862.40 = 984.80/x
  3. Step 3: Cross multiply
    1,243.10x = 1,862.40 × 984.80
  4. Step 4: Simplify right side
    1,243.10x = 1,834,091.52
  5. Step 5: Solve for x
    x = 1,834,091.52/1,243.10
  6. Step 6: Final answer
    x = 1,475.42

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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.