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Finding the Fourth Proportional to 363,628.20, 545,400.54 and 138,983.64

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Solution

The fourth proportional to 363,628.20, 545,400.54 and 138,983.64 is: 208,459.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    363,628.20 : 545,400.54 = 138,983.64 : x
  2. Step 2: Convert to fraction form
    363,628.20/545,400.54 = 138,983.64/x
  3. Step 3: Cross multiply
    363,628.20x = 545,400.54 × 138,983.64
  4. Step 4: Simplify right side
    363,628.20x = 75,801,752,307.17
  5. Step 5: Solve for x
    x = 75,801,752,307.17/363,628.20
  6. Step 6: Final answer
    x = 208,459.50

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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.