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Finding the Fourth Proportional to 256,395.36, 384,351.12 and 90,092.64

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Solution

The fourth proportional to 256,395.36, 384,351.12 and 90,092.64 is: 135,053.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,395.36 : 384,351.12 = 90,092.64 : x
  2. Step 2: Convert to fraction form
    256,395.36/384,351.12 = 90,092.64/x
  3. Step 3: Cross multiply
    256,395.36x = 384,351.12 × 90,092.64
  4. Step 4: Simplify right side
    256,395.36x = 34,627,207,087.76
  5. Step 5: Solve for x
    x = 34,627,207,087.76/256,395.36
  6. Step 6: Final answer
    x = 135,053.95

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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.