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Finding the Fourth Proportional to 402,651, 555,644.22 and 221,361.61

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Solution

The fourth proportional to 402,651, 555,644.22 and 221,361.61 is: 305,471.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,651 : 555,644.22 = 221,361.61 : x
  2. Step 2: Convert to fraction form
    402,651/555,644.22 = 221,361.61/x
  3. Step 3: Cross multiply
    402,651x = 555,644.22 × 221,361.61
  4. Step 4: Simplify right side
    402,651x = 122,998,299,194.17
  5. Step 5: Solve for x
    x = 122,998,299,194.17/402,651
  6. Step 6: Final answer
    x = 305,471.24

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.