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Finding the Fourth Proportional to 259,910.31, 390,020.99 and 238,759.59

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Solution

The fourth proportional to 259,910.31, 390,020.99 and 238,759.59 is: 358,282.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,910.31 : 390,020.99 = 238,759.59 : x
  2. Step 2: Convert to fraction form
    259,910.31/390,020.99 = 238,759.59/x
  3. Step 3: Cross multiply
    259,910.31x = 390,020.99 × 238,759.59
  4. Step 4: Simplify right side
    259,910.31x = 93,121,250,470.00
  5. Step 5: Solve for x
    x = 93,121,250,470.00/259,910.31
  6. Step 6: Final answer
    x = 358,282.25

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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.