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Finding the Fourth Proportional to 395,168.60, 545,327.16 and 225,405.56

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Solution

The fourth proportional to 395,168.60, 545,327.16 and 225,405.56 is: 311,056.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,168.60 : 545,327.16 = 225,405.56 : x
  2. Step 2: Convert to fraction form
    395,168.60/545,327.16 = 225,405.56/x
  3. Step 3: Cross multiply
    395,168.60x = 545,327.16 × 225,405.56
  4. Step 4: Simplify right side
    395,168.60x = 122,919,773,883.01
  5. Step 5: Solve for x
    x = 122,919,773,883.01/395,168.60
  6. Step 6: Final answer
    x = 311,056.53

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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.