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Finding the Fourth Proportional to 487,691.96, 672,969.26 and 303,913.49

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Solution

The fourth proportional to 487,691.96, 672,969.26 and 303,913.49 is: 419,372.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,691.96 : 672,969.26 = 303,913.49 : x
  2. Step 2: Convert to fraction form
    487,691.96/672,969.26 = 303,913.49/x
  3. Step 3: Cross multiply
    487,691.96x = 672,969.26 × 303,913.49
  4. Step 4: Simplify right side
    487,691.96x = 204,524,431,584.90
  5. Step 5: Solve for x
    x = 204,524,431,584.90/487,691.96
  6. Step 6: Final answer
    x = 419,372.17

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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.