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Finding the Fourth Proportional to 279,245.35, 385,360.26 and 151,921.86

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Solution

The fourth proportional to 279,245.35, 385,360.26 and 151,921.86 is: 209,653.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,245.35 : 385,360.26 = 151,921.86 : x
  2. Step 2: Convert to fraction form
    279,245.35/385,360.26 = 151,921.86/x
  3. Step 3: Cross multiply
    279,245.35x = 385,360.26 × 151,921.86
  4. Step 4: Simplify right side
    279,245.35x = 58,544,645,542.48
  5. Step 5: Solve for x
    x = 58,544,645,542.48/279,245.35
  6. Step 6: Final answer
    x = 209,653.07

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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.