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Finding the Fourth Proportional to 260,411.22, 390,648.08 and 91,896.75

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Solution

The fourth proportional to 260,411.22, 390,648.08 and 91,896.75 is: 137,856.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,411.22 : 390,648.08 = 91,896.75 : x
  2. Step 2: Convert to fraction form
    260,411.22/390,648.08 = 91,896.75/x
  3. Step 3: Cross multiply
    260,411.22x = 390,648.08 × 91,896.75
  4. Step 4: Simplify right side
    260,411.22x = 35,899,289,175.48
  5. Step 5: Solve for x
    x = 35,899,289,175.48/260,411.22
  6. Step 6: Final answer
    x = 137,856.15

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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.