Home / 1,243.90-1,865.85-1,209.34

Finding the Fourth Proportional to 1,243.90, 1,865.85 and 1,209.34

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Solution

The fourth proportional to 1,243.90, 1,865.85 and 1,209.34 is: 1,814.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.90 : 1,865.85 = 1,209.34 : x
  2. Step 2: Convert to fraction form
    1,243.90/1,865.85 = 1,209.34/x
  3. Step 3: Cross multiply
    1,243.90x = 1,865.85 × 1,209.34
  4. Step 4: Simplify right side
    1,243.90x = 2,256,447.04
  5. Step 5: Solve for x
    x = 2,256,447.04/1,243.90
  6. Step 6: Final answer
    x = 1,814.01

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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.