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Finding the Fourth Proportional to 397,151.47, 548,072.70 and 215,863.81

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Solution

The fourth proportional to 397,151.47, 548,072.70 and 215,863.81 is: 297,894.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,151.47 : 548,072.70 = 215,863.81 : x
  2. Step 2: Convert to fraction form
    397,151.47/548,072.70 = 215,863.81/x
  3. Step 3: Cross multiply
    397,151.47x = 548,072.70 × 215,863.81
  4. Step 4: Simplify right side
    397,151.47x = 118,309,061,178.99
  5. Step 5: Solve for x
    x = 118,309,061,178.99/397,151.47
  6. Step 6: Final answer
    x = 297,894.05

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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.