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Finding the Fourth Proportional to 484,940.82, 669,217.88 and 281,109.79

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Solution

The fourth proportional to 484,940.82, 669,217.88 and 281,109.79 is: 387,931.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,940.82 : 669,217.88 = 281,109.79 : x
  2. Step 2: Convert to fraction form
    484,940.82/669,217.88 = 281,109.79/x
  3. Step 3: Cross multiply
    484,940.82x = 669,217.88 × 281,109.79
  4. Step 4: Simplify right side
    484,940.82x = 188,123,699,250.34
  5. Step 5: Solve for x
    x = 188,123,699,250.34/484,940.82
  6. Step 6: Final answer
    x = 387,931.25

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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.