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Finding the Fourth Proportional to 260,358.26, 390,568.17 and 91,843.43

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Solution

The fourth proportional to 260,358.26, 390,568.17 and 91,843.43 is: 137,776.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,358.26 : 390,568.17 = 91,843.43 : x
  2. Step 2: Convert to fraction form
    260,358.26/390,568.17 = 91,843.43/x
  3. Step 3: Cross multiply
    260,358.26x = 390,568.17 × 91,843.43
  4. Step 4: Simplify right side
    260,358.26x = 35,871,120,381.62
  5. Step 5: Solve for x
    x = 35,871,120,381.62/260,358.26
  6. Step 6: Final answer
    x = 137,776.00

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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.