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Finding the Fourth Proportional to 221,611.80, 307,888.90 and 218,954.58

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Solution

The fourth proportional to 221,611.80, 307,888.90 and 218,954.58 is: 304,197.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,611.80 : 307,888.90 = 218,954.58 : x
  2. Step 2: Convert to fraction form
    221,611.80/307,888.90 = 218,954.58/x
  3. Step 3: Cross multiply
    221,611.80x = 307,888.90 × 218,954.58
  4. Step 4: Simplify right side
    221,611.80x = 67,413,684,786.16
  5. Step 5: Solve for x
    x = 67,413,684,786.16/221,611.80
  6. Step 6: Final answer
    x = 304,197.18

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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.