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Finding the Fourth Proportional to 384,693.20, 577,039.80 and 218,805.20

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Solution

The fourth proportional to 384,693.20, 577,039.80 and 218,805.20 is: 328,207.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,693.20 : 577,039.80 = 218,805.20 : x
  2. Step 2: Convert to fraction form
    384,693.20/577,039.80 = 218,805.20/x
  3. Step 3: Cross multiply
    384,693.20x = 577,039.80 × 218,805.20
  4. Step 4: Simplify right side
    384,693.20x = 126,259,308,846.96
  5. Step 5: Solve for x
    x = 126,259,308,846.96/384,693.20
  6. Step 6: Final answer
    x = 328,207.80

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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.