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Finding the Fourth Proportional to 487,611.87, 731,154.81 and 221,227.05

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Solution

The fourth proportional to 487,611.87, 731,154.81 and 221,227.05 is: 331,721.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,611.87 : 731,154.81 = 221,227.05 : x
  2. Step 2: Convert to fraction form
    487,611.87/731,154.81 = 221,227.05/x
  3. Step 3: Cross multiply
    487,611.87x = 731,154.81 × 221,227.05
  4. Step 4: Simplify right side
    487,611.87x = 161,751,221,709.61
  5. Step 5: Solve for x
    x = 161,751,221,709.61/487,611.87
  6. Step 6: Final answer
    x = 331,721.26

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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.