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Finding the Fourth Proportional to 636,341.60, 878,128.96 and 349,859.48

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Solution

The fourth proportional to 636,341.60, 878,128.96 and 349,859.48 is: 482,793.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,341.60 : 878,128.96 = 349,859.48 : x
  2. Step 2: Convert to fraction form
    636,341.60/878,128.96 = 349,859.48/x
  3. Step 3: Cross multiply
    636,341.60x = 878,128.96 × 349,859.48
  4. Step 4: Simplify right side
    636,341.60x = 307,221,741,318.54
  5. Step 5: Solve for x
    x = 307,221,741,318.54/636,341.60
  6. Step 6: Final answer
    x = 482,793.74

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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.