Home / 258,845.32-388,381.04-90,486.52

Finding the Fourth Proportional to 258,845.32, 388,381.04 and 90,486.52

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Solution

The fourth proportional to 258,845.32, 388,381.04 and 90,486.52 is: 135,769.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,845.32 : 388,381.04 = 90,486.52 : x
  2. Step 2: Convert to fraction form
    258,845.32/388,381.04 = 90,486.52/x
  3. Step 3: Cross multiply
    258,845.32x = 388,381.04 × 90,486.52
  4. Step 4: Simplify right side
    258,845.32x = 35,143,248,743.58
  5. Step 5: Solve for x
    x = 35,143,248,743.58/258,845.32
  6. Step 6: Final answer
    x = 135,769.30

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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.