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Finding the Fourth Proportional to 636,449.74, 878,300.65 and 349,969.83

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Solution

The fourth proportional to 636,449.74, 878,300.65 and 349,969.83 is: 482,958.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,449.74 : 878,300.65 = 349,969.83 : x
  2. Step 2: Convert to fraction form
    636,449.74/878,300.65 = 349,969.83/x
  3. Step 3: Cross multiply
    636,449.74x = 878,300.65 × 349,969.83
  4. Step 4: Simplify right side
    636,449.74x = 307,378,726,810.12
  5. Step 5: Solve for x
    x = 307,378,726,810.12/636,449.74
  6. Step 6: Final answer
    x = 482,958.37

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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.