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Finding the Fourth Proportional to 636,328.82, 878,416.85 and 378,289.32

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Solution

The fourth proportional to 636,328.82, 878,416.85 and 378,289.32 is: 522,207.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,328.82 : 878,416.85 = 378,289.32 : x
  2. Step 2: Convert to fraction form
    636,328.82/878,416.85 = 378,289.32/x
  3. Step 3: Cross multiply
    636,328.82x = 878,416.85 × 378,289.32
  4. Step 4: Simplify right side
    636,328.82x = 332,295,715,455.80
  5. Step 5: Solve for x
    x = 332,295,715,455.80/636,328.82
  6. Step 6: Final answer
    x = 522,207.55

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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.