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Finding the Fourth Proportional to 636,348.54, 878,138.55 and 349,866.42

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Solution

The fourth proportional to 636,348.54, 878,138.55 and 349,866.42 is: 482,803.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,348.54 : 878,138.55 = 349,866.42 : x
  2. Step 2: Convert to fraction form
    636,348.54/878,138.55 = 349,866.42/x
  3. Step 3: Cross multiply
    636,348.54x = 878,138.55 × 349,866.42
  4. Step 4: Simplify right side
    636,348.54x = 307,231,190,752.49
  5. Step 5: Solve for x
    x = 307,231,190,752.49/636,348.54
  6. Step 6: Final answer
    x = 482,803.32

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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.