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Finding the Fourth Proportional to 386,728.60, 579,747.30 and 253,672.60

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Solution

The fourth proportional to 386,728.60, 579,747.30 and 253,672.60 is: 380,282.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,728.60 : 579,747.30 = 253,672.60 : x
  2. Step 2: Convert to fraction form
    386,728.60/579,747.30 = 253,672.60/x
  3. Step 3: Cross multiply
    386,728.60x = 579,747.30 × 253,672.60
  4. Step 4: Simplify right side
    386,728.60x = 147,066,004,933.98
  5. Step 5: Solve for x
    x = 147,066,004,933.98/386,728.60
  6. Step 6: Final answer
    x = 380,282.21

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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.