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Finding the Fourth Proportional to 636,308.70, 878,112.02 and 349,830.88

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Solution

The fourth proportional to 636,308.70, 878,112.02 and 349,830.88 is: 482,769.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,308.70 : 878,112.02 = 349,830.88 : x
  2. Step 2: Convert to fraction form
    636,308.70/878,112.02 = 349,830.88/x
  3. Step 3: Cross multiply
    636,308.70x = 878,112.02 × 349,830.88
  4. Step 4: Simplify right side
    636,308.70x = 307,190,700,695.18
  5. Step 5: Solve for x
    x = 307,190,700,695.18/636,308.70
  6. Step 6: Final answer
    x = 482,769.92

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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.