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Finding the Fourth Proportional to 397,685.14, 548,800.87 and 216,393.94

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Solution

The fourth proportional to 397,685.14, 548,800.87 and 216,393.94 is: 298,621.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    397,685.14 : 548,800.87 = 216,393.94 : x
  2. Step 2: Convert to fraction form
    397,685.14/548,800.87 = 216,393.94/x
  3. Step 3: Cross multiply
    397,685.14x = 548,800.87 × 216,393.94
  4. Step 4: Simplify right side
    397,685.14x = 118,757,182,534.73
  5. Step 5: Solve for x
    x = 118,757,182,534.73/397,685.14
  6. Step 6: Final answer
    x = 298,621.13

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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.