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Finding the Fourth Proportional to 384,697.20, 577,045.80 and 218,809.20

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Solution

The fourth proportional to 384,697.20, 577,045.80 and 218,809.20 is: 328,213.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    384,697.20 : 577,045.80 = 218,809.20 : x
  2. Step 2: Convert to fraction form
    384,697.20/577,045.80 = 218,809.20/x
  3. Step 3: Cross multiply
    384,697.20x = 577,045.80 × 218,809.20
  4. Step 4: Simplify right side
    384,697.20x = 126,262,929,861.36
  5. Step 5: Solve for x
    x = 126,262,929,861.36/384,697.20
  6. Step 6: Final answer
    x = 328,213.80

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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.