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Finding the Fourth Proportional to 636,441.67, 878,312.10 and 349,983.55

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Solution

The fourth proportional to 636,441.67, 878,312.10 and 349,983.55 is: 482,989.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,441.67 : 878,312.10 = 349,983.55 : x
  2. Step 2: Convert to fraction form
    636,441.67/878,312.10 = 349,983.55/x
  3. Step 3: Cross multiply
    636,441.67x = 878,312.10 × 349,983.55
  4. Step 4: Simplify right side
    636,441.67x = 307,394,786,765.96
  5. Step 5: Solve for x
    x = 307,394,786,765.96/636,441.67
  6. Step 6: Final answer
    x = 482,989.72

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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.