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Finding the Fourth Proportional to 387,275.67, 580,913.96 and 121,037.58

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Solution

The fourth proportional to 387,275.67, 580,913.96 and 121,037.58 is: 181,556.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,275.67 : 580,913.96 = 121,037.58 : x
  2. Step 2: Convert to fraction form
    387,275.67/580,913.96 = 121,037.58/x
  3. Step 3: Cross multiply
    387,275.67x = 580,913.96 × 121,037.58
  4. Step 4: Simplify right side
    387,275.67x = 70,312,419,906.62
  5. Step 5: Solve for x
    x = 70,312,419,906.62/387,275.67
  6. Step 6: Final answer
    x = 181,556.51

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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.