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Finding the Fourth Proportional to 258,773.88, 388,209.84 and 90,342.30

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Solution

The fourth proportional to 258,773.88, 388,209.84 and 90,342.30 is: 135,530.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,773.88 : 388,209.84 = 90,342.30 : x
  2. Step 2: Convert to fraction form
    258,773.88/388,209.84 = 90,342.30/x
  3. Step 3: Cross multiply
    258,773.88x = 388,209.84 × 90,342.30
  4. Step 4: Simplify right side
    258,773.88x = 35,071,769,828.23
  5. Step 5: Solve for x
    x = 35,071,769,828.23/258,773.88
  6. Step 6: Final answer
    x = 135,530.56

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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.