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Finding the Fourth Proportional to 258,436.58, 387,620.54 and 98,469.37

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Solution

The fourth proportional to 258,436.58, 387,620.54 and 98,469.37 is: 147,690.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,436.58 : 387,620.54 = 98,469.37 : x
  2. Step 2: Convert to fraction form
    258,436.58/387,620.54 = 98,469.37/x
  3. Step 3: Cross multiply
    258,436.58x = 387,620.54 × 98,469.37
  4. Step 4: Simplify right side
    258,436.58x = 38,168,750,734.30
  5. Step 5: Solve for x
    x = 38,168,750,734.30/258,436.58
  6. Step 6: Final answer
    x = 147,690.98

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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.