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Finding the Fourth Proportional to 260,936.40, 391,447.80 and 111,248.40

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Solution

The fourth proportional to 260,936.40, 391,447.80 and 111,248.40 is: 166,891.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,936.40 : 391,447.80 = 111,248.40 : x
  2. Step 2: Convert to fraction form
    260,936.40/391,447.80 = 111,248.40/x
  3. Step 3: Cross multiply
    260,936.40x = 391,447.80 × 111,248.40
  4. Step 4: Simplify right side
    260,936.40x = 43,547,941,433.52
  5. Step 5: Solve for x
    x = 43,547,941,433.52/260,936.40
  6. Step 6: Final answer
    x = 166,891.02

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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.