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Finding the Fourth Proportional to 258,775.88, 388,212.84 and 90,344.30

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Solution

The fourth proportional to 258,775.88, 388,212.84 and 90,344.30 is: 135,533.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,775.88 : 388,212.84 = 90,344.30 : x
  2. Step 2: Convert to fraction form
    258,775.88/388,212.84 = 90,344.30/x
  3. Step 3: Cross multiply
    258,775.88x = 388,212.84 × 90,344.30
  4. Step 4: Simplify right side
    258,775.88x = 35,072,815,339.75
  5. Step 5: Solve for x
    x = 35,072,815,339.75/258,775.88
  6. Step 6: Final answer
    x = 135,533.56

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1.5x scale

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.