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Finding the Fourth Proportional to 259,354.78, 389,032.20 and 69,815.59

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Solution

The fourth proportional to 259,354.78, 389,032.20 and 69,815.59 is: 104,723.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,354.78 : 389,032.20 = 69,815.59 : x
  2. Step 2: Convert to fraction form
    259,354.78/389,032.20 = 69,815.59/x
  3. Step 3: Cross multiply
    259,354.78x = 389,032.20 × 69,815.59
  4. Step 4: Simplify right side
    259,354.78x = 27,160,511,599.42
  5. Step 5: Solve for x
    x = 27,160,511,599.42/259,354.78
  6. Step 6: Final answer
    x = 104,723.39

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1.5x scale

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.