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Finding the Fourth Proportional to 1,209.16, 1,811.34 and 883.24

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Solution

The fourth proportional to 1,209.16, 1,811.34 and 883.24 is: 1,323.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209.16 : 1,811.34 = 883.24 : x
  2. Step 2: Convert to fraction form
    1,209.16/1,811.34 = 883.24/x
  3. Step 3: Cross multiply
    1,209.16x = 1,811.34 × 883.24
  4. Step 4: Simplify right side
    1,209.16x = 1,599,847.94
  5. Step 5: Solve for x
    x = 1,599,847.94/1,209.16
  6. Step 6: Final answer
    x = 1,323.11

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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.