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Finding the Fourth Proportional to 636,310.68, 878,109.30 and 349,835.64

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Solution

The fourth proportional to 636,310.68, 878,109.30 and 349,835.64 is: 482,773.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,310.68 : 878,109.30 = 349,835.64 : x
  2. Step 2: Convert to fraction form
    636,310.68/878,109.30 = 349,835.64/x
  3. Step 3: Cross multiply
    636,310.68x = 878,109.30 × 349,835.64
  4. Step 4: Simplify right side
    636,310.68x = 307,193,928,955.45
  5. Step 5: Solve for x
    x = 307,193,928,955.45/636,310.68
  6. Step 6: Final answer
    x = 482,773.49

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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.