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Finding the Fourth Proportional to 298,695.09, 411,922.35 and 217,994.79

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Solution

The fourth proportional to 298,695.09, 411,922.35 and 217,994.79 is: 300,630.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,695.09 : 411,922.35 = 217,994.79 : x
  2. Step 2: Convert to fraction form
    298,695.09/411,922.35 = 217,994.79/x
  3. Step 3: Cross multiply
    298,695.09x = 411,922.35 × 217,994.79
  4. Step 4: Simplify right side
    298,695.09x = 89,796,926,184.56
  5. Step 5: Solve for x
    x = 89,796,926,184.56/298,695.09
  6. Step 6: Final answer
    x = 300,630.74

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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.