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Finding the Fourth Proportional to 395,355.43, 545,578.82 and 223,280.45

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Solution

The fourth proportional to 395,355.43, 545,578.82 and 223,280.45 is: 308,120.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,355.43 : 545,578.82 = 223,280.45 : x
  2. Step 2: Convert to fraction form
    395,355.43/545,578.82 = 223,280.45/x
  3. Step 3: Cross multiply
    395,355.43x = 545,578.82 × 223,280.45
  4. Step 4: Simplify right side
    395,355.43x = 121,817,081,712.18
  5. Step 5: Solve for x
    x = 121,817,081,712.18/395,355.43
  6. Step 6: Final answer
    x = 308,120.43

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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.