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Finding the Fourth Proportional to 221,620.10, 307,900.49 and 218,962.89

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Solution

The fourth proportional to 221,620.10, 307,900.49 and 218,962.89 is: 304,208.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,620.10 : 307,900.49 = 218,962.89 : x
  2. Step 2: Convert to fraction form
    221,620.10/307,900.49 = 218,962.89/x
  3. Step 3: Cross multiply
    221,620.10x = 307,900.49 × 218,962.89
  4. Step 4: Simplify right side
    221,620.10x = 67,418,780,028.00
  5. Step 5: Solve for x
    x = 67,418,780,028.00/221,620.10
  6. Step 6: Final answer
    x = 304,208.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.