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Finding the Fourth Proportional to 300,912.78, 415,112.67 and 253,148.70

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Solution

The fourth proportional to 300,912.78, 415,112.67 and 253,148.70 is: 349,221.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,912.78 : 415,112.67 = 253,148.70 : x
  2. Step 2: Convert to fraction form
    300,912.78/415,112.67 = 253,148.70/x
  3. Step 3: Cross multiply
    300,912.78x = 415,112.67 × 253,148.70
  4. Step 4: Simplify right side
    300,912.78x = 105,085,232,764.03
  5. Step 5: Solve for x
    x = 105,085,232,764.03/300,912.78
  6. Step 6: Final answer
    x = 349,221.57

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1.5x scale

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.