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Finding the Fourth Proportional to 258,338.70, 387,349.56 and 100,382.76

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Solution

The fourth proportional to 258,338.70, 387,349.56 and 100,382.76 is: 150,512.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,338.70 : 387,349.56 = 100,382.76 : x
  2. Step 2: Convert to fraction form
    258,338.70/387,349.56 = 100,382.76/x
  3. Step 3: Cross multiply
    258,338.70x = 387,349.56 × 100,382.76
  4. Step 4: Simplify right side
    258,338.70x = 38,883,217,917.59
  5. Step 5: Solve for x
    x = 38,883,217,917.59/258,338.70
  6. Step 6: Final answer
    x = 150,512.56

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1.5x scale

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.