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Finding the Fourth Proportional to 397,355.69, 548,216.64 and 225,255.20

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Solution

The fourth proportional to 397,355.69, 548,216.64 and 225,255.20 is: 310,776.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,355.69 : 548,216.64 = 225,255.20 : x
  2. Step 2: Convert to fraction form
    397,355.69/548,216.64 = 225,255.20/x
  3. Step 3: Cross multiply
    397,355.69x = 548,216.64 × 225,255.20
  4. Step 4: Simplify right side
    397,355.69x = 123,488,646,145.45
  5. Step 5: Solve for x
    x = 123,488,646,145.45/397,355.69
  6. Step 6: Final answer
    x = 310,776.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.