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Finding the Fourth Proportional to 445,778.35, 668,665.20 and 108,820.78

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Solution

The fourth proportional to 445,778.35, 668,665.20 and 108,820.78 is: 163,230.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,778.35 : 668,665.20 = 108,820.78 : x
  2. Step 2: Convert to fraction form
    445,778.35/668,665.20 = 108,820.78/x
  3. Step 3: Cross multiply
    445,778.35x = 668,665.20 × 108,820.78
  4. Step 4: Simplify right side
    445,778.35x = 72,764,666,951.19
  5. Step 5: Solve for x
    x = 72,764,666,951.19/445,778.35
  6. Step 6: Final answer
    x = 163,230.60

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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.