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Finding the Fourth Proportional to 483,988.59, 667,631.89 and 290,344.78

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Solution

The fourth proportional to 483,988.59, 667,631.89 and 290,344.78 is: 400,512.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,988.59 : 667,631.89 = 290,344.78 : x
  2. Step 2: Convert to fraction form
    483,988.59/667,631.89 = 290,344.78/x
  3. Step 3: Cross multiply
    483,988.59x = 667,631.89 × 290,344.78
  4. Step 4: Simplify right side
    483,988.59x = 193,843,434,223.03
  5. Step 5: Solve for x
    x = 193,843,434,223.03/483,988.59
  6. Step 6: Final answer
    x = 400,512.41

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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.