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Finding the Fourth Proportional to 636,328.47, 878,110.70 and 349,846.47

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Solution

The fourth proportional to 636,328.47, 878,110.70 and 349,846.47 is: 482,775.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,328.47 : 878,110.70 = 349,846.47 : x
  2. Step 2: Convert to fraction form
    636,328.47/878,110.70 = 349,846.47/x
  3. Step 3: Cross multiply
    636,328.47x = 878,110.70 × 349,846.47
  4. Step 4: Simplify right side
    636,328.47x = 307,203,926,915.00
  5. Step 5: Solve for x
    x = 307,203,926,915.00/636,328.47
  6. Step 6: Final answer
    x = 482,775.71

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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.