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Finding the Fourth Proportional to 258,887.60, 388,331.40 and 92,615.60

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Solution

The fourth proportional to 258,887.60, 388,331.40 and 92,615.60 is: 138,923.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,887.60 : 388,331.40 = 92,615.60 : x
  2. Step 2: Convert to fraction form
    258,887.60/388,331.40 = 92,615.60/x
  3. Step 3: Cross multiply
    258,887.60x = 388,331.40 × 92,615.60
  4. Step 4: Simplify right side
    258,887.60x = 35,965,545,609.84
  5. Step 5: Solve for x
    x = 35,965,545,609.84/258,887.60
  6. Step 6: Final answer
    x = 138,923.40

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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.