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Finding the Fourth Proportional to 265,280.80, 397,991.60 and 115,456.80

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Solution

The fourth proportional to 265,280.80, 397,991.60 and 115,456.80 is: 173,215.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,280.80 : 397,991.60 = 115,456.80 : x
  2. Step 2: Convert to fraction form
    265,280.80/397,991.60 = 115,456.80/x
  3. Step 3: Cross multiply
    265,280.80x = 397,991.60 × 115,456.80
  4. Step 4: Simplify right side
    265,280.80x = 45,950,836,562.88
  5. Step 5: Solve for x
    x = 45,950,836,562.88/265,280.80
  6. Step 6: Final answer
    x = 173,215.84

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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.