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Finding the Fourth Proportional to 523,140.39, 721,957.46 and 308,289.51

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Solution

The fourth proportional to 523,140.39, 721,957.46 and 308,289.51 is: 425,453.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,140.39 : 721,957.46 = 308,289.51 : x
  2. Step 2: Convert to fraction form
    523,140.39/721,957.46 = 308,289.51/x
  3. Step 3: Cross multiply
    523,140.39x = 721,957.46 × 308,289.51
  4. Step 4: Simplify right side
    523,140.39x = 222,571,910,042.80
  5. Step 5: Solve for x
    x = 222,571,910,042.80/523,140.39
  6. Step 6: Final answer
    x = 425,453.50

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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.