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Finding the Fourth Proportional to 300,836.70, 415,155.78 and 173,512.80

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Solution

The fourth proportional to 300,836.70, 415,155.78 and 173,512.80 is: 239,448.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,836.70 : 415,155.78 = 173,512.80 : x
  2. Step 2: Convert to fraction form
    300,836.70/415,155.78 = 173,512.80/x
  3. Step 3: Cross multiply
    300,836.70x = 415,155.78 × 173,512.80
  4. Step 4: Simplify right side
    300,836.70x = 72,034,841,823.98
  5. Step 5: Solve for x
    x = 72,034,841,823.98/300,836.70
  6. Step 6: Final answer
    x = 239,448.32

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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.