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Finding the Fourth Proportional to 1,816.09, 2,725.22 and 661.93

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Solution

The fourth proportional to 1,816.09, 2,725.22 and 661.93 is: 993.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,816.09 : 2,725.22 = 661.93 : x
  2. Step 2: Convert to fraction form
    1,816.09/2,725.22 = 661.93/x
  3. Step 3: Cross multiply
    1,816.09x = 2,725.22 × 661.93
  4. Step 4: Simplify right side
    1,816.09x = 1,803,904.87
  5. Step 5: Solve for x
    x = 1,803,904.87/1,816.09
  6. Step 6: Final answer
    x = 993.29

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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.