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Finding the Fourth Proportional to 398,795.58, 550,335.78 and 217,504.26

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Solution

The fourth proportional to 398,795.58, 550,335.78 and 217,504.26 is: 300,154.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,795.58 : 550,335.78 = 217,504.26 : x
  2. Step 2: Convert to fraction form
    398,795.58/550,335.78 = 217,504.26/x
  3. Step 3: Cross multiply
    398,795.58x = 550,335.78 × 217,504.26
  4. Step 4: Simplify right side
    398,795.58x = 119,700,376,580.42
  5. Step 5: Solve for x
    x = 119,700,376,580.42/398,795.58
  6. Step 6: Final answer
    x = 300,154.72

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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.