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Finding the Fourth Proportional to 636,434.17, 878,301.75 and 349,976.05

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Solution

The fourth proportional to 636,434.17, 878,301.75 and 349,976.05 is: 482,979.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,434.17 : 878,301.75 = 349,976.05 : x
  2. Step 2: Convert to fraction form
    636,434.17/878,301.75 = 349,976.05/x
  3. Step 3: Cross multiply
    636,434.17x = 878,301.75 × 349,976.05
  4. Step 4: Simplify right side
    636,434.17x = 307,384,577,173.09
  5. Step 5: Solve for x
    x = 307,384,577,173.09/636,434.17
  6. Step 6: Final answer
    x = 482,979.37

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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.