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Finding the Fourth Proportional to 397,003.11, 547,866.53 and 215,716.51

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Solution

The fourth proportional to 397,003.11, 547,866.53 and 215,716.51 is: 297,690.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,003.11 : 547,866.53 = 215,716.51 : x
  2. Step 2: Convert to fraction form
    397,003.11/547,866.53 = 215,716.51/x
  3. Step 3: Cross multiply
    397,003.11x = 547,866.53 × 215,716.51
  4. Step 4: Simplify right side
    397,003.11x = 118,183,855,797.41
  5. Step 5: Solve for x
    x = 118,183,855,797.41/397,003.11
  6. Step 6: Final answer
    x = 297,690.00

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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.