Home / 258,832.25-388,341.80-90,377.40

Finding the Fourth Proportional to 258,832.25, 388,341.80 and 90,377.40

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Solution

The fourth proportional to 258,832.25, 388,341.80 and 90,377.40 is: 135,598.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,832.25 : 388,341.80 = 90,377.40 : x
  2. Step 2: Convert to fraction form
    258,832.25/388,341.80 = 90,377.40/x
  3. Step 3: Cross multiply
    258,832.25x = 388,341.80 × 90,377.40
  4. Step 4: Simplify right side
    258,832.25x = 35,097,321,743.43
  5. Step 5: Solve for x
    x = 35,097,321,743.43/258,832.25
  6. Step 6: Final answer
    x = 135,598.72

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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.