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Finding the Fourth Proportional to 259,398.60, 389,097.90 and 154,163.40

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Solution

The fourth proportional to 259,398.60, 389,097.90 and 154,163.40 is: 231,245.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,398.60 : 389,097.90 = 154,163.40 : x
  2. Step 2: Convert to fraction form
    259,398.60/389,097.90 = 154,163.40/x
  3. Step 3: Cross multiply
    259,398.60x = 389,097.90 × 154,163.40
  4. Step 4: Simplify right side
    259,398.60x = 59,984,655,196.86
  5. Step 5: Solve for x
    x = 59,984,655,196.86/259,398.60
  6. Step 6: Final answer
    x = 231,245.10

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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.