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Finding the Fourth Proportional to 221,611.51, 307,888.51 and 218,954.31

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Solution

The fourth proportional to 221,611.51, 307,888.51 and 218,954.31 is: 304,196.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,611.51 : 307,888.51 = 218,954.31 : x
  2. Step 2: Convert to fraction form
    221,611.51/307,888.51 = 218,954.31/x
  3. Step 3: Cross multiply
    221,611.51x = 307,888.51 × 218,954.31
  4. Step 4: Simplify right side
    221,611.51x = 67,413,516,263.98
  5. Step 5: Solve for x
    x = 67,413,516,263.98/221,611.51
  6. Step 6: Final answer
    x = 304,196.82

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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.