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Finding the Fourth Proportional to 357,415.22, 493,322.25 and 221,367.62

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Solution

The fourth proportional to 357,415.22, 493,322.25 and 221,367.62 is: 305,542.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    357,415.22 : 493,322.25 = 221,367.62 : x
  2. Step 2: Convert to fraction form
    357,415.22/493,322.25 = 221,367.62/x
  3. Step 3: Cross multiply
    357,415.22x = 493,322.25 × 221,367.62
  4. Step 4: Simplify right side
    357,415.22x = 109,205,569,908.93
  5. Step 5: Solve for x
    x = 109,205,569,908.93/357,415.22
  6. Step 6: Final answer
    x = 305,542.59

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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.