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Finding the Fourth Proportional to 258,828.48, 388,276.88 and 90,351.84

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Solution

The fourth proportional to 258,828.48, 388,276.88 and 90,351.84 is: 135,539.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,828.48 : 388,276.88 = 90,351.84 : x
  2. Step 2: Convert to fraction form
    258,828.48/388,276.88 = 90,351.84/x
  3. Step 3: Cross multiply
    258,828.48x = 388,276.88 × 90,351.84
  4. Step 4: Simplify right side
    258,828.48x = 35,081,530,537.46
  5. Step 5: Solve for x
    x = 35,081,530,537.46/258,828.48
  6. Step 6: Final answer
    x = 135,539.68

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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.