Home / 1,209.72-1,816.44-1,159.80

Finding the Fourth Proportional to 1,209.72, 1,816.44 and 1,159.80

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Solution

The fourth proportional to 1,209.72, 1,816.44 and 1,159.80 is: 1,741.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.72 : 1,816.44 = 1,159.80 : x
  2. Step 2: Convert to fraction form
    1,209.72/1,816.44 = 1,159.80/x
  3. Step 3: Cross multiply
    1,209.72x = 1,816.44 × 1,159.80
  4. Step 4: Simplify right side
    1,209.72x = 2,106,707.11
  5. Step 5: Solve for x
    x = 2,106,707.11/1,209.72
  6. Step 6: Final answer
    x = 1,741.48

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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.