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Finding the Fourth Proportional to 387,277.80, 580,917.15 and 121,039.71

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Solution

The fourth proportional to 387,277.80, 580,917.15 and 121,039.71 is: 181,559.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,277.80 : 580,917.15 = 121,039.71 : x
  2. Step 2: Convert to fraction form
    387,277.80/580,917.15 = 121,039.71/x
  3. Step 3: Cross multiply
    387,277.80x = 580,917.15 × 121,039.71
  4. Step 4: Simplify right side
    387,277.80x = 70,314,039,860.24
  5. Step 5: Solve for x
    x = 70,314,039,860.24/387,277.80
  6. Step 6: Final answer
    x = 181,559.70

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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.