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Finding the Fourth Proportional to 251,013.80, 376,520.70 and 216,021.80

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Solution

The fourth proportional to 251,013.80, 376,520.70 and 216,021.80 is: 324,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,013.80 : 376,520.70 = 216,021.80 : x
  2. Step 2: Convert to fraction form
    251,013.80/376,520.70 = 216,021.80/x
  3. Step 3: Cross multiply
    251,013.80x = 376,520.70 × 216,021.80
  4. Step 4: Simplify right side
    251,013.80x = 81,336,679,351.26
  5. Step 5: Solve for x
    x = 81,336,679,351.26/251,013.80
  6. Step 6: Final answer
    x = 324,032.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.