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Finding the Fourth Proportional to 395,397.60, 545,657.85 and 225,647.52

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Solution

The fourth proportional to 395,397.60, 545,657.85 and 225,647.52 is: 311,398.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,397.60 : 545,657.85 = 225,647.52 : x
  2. Step 2: Convert to fraction form
    395,397.60/545,657.85 = 225,647.52/x
  3. Step 3: Cross multiply
    395,397.60x = 545,657.85 × 225,647.52
  4. Step 4: Simplify right side
    395,397.60x = 123,126,340,621.03
  5. Step 5: Solve for x
    x = 123,126,340,621.03/395,397.60
  6. Step 6: Final answer
    x = 311,398.81

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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.