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Finding the Fourth Proportional to 636,234.43, 878,020.32 and 345,865.53

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Solution

The fourth proportional to 636,234.43, 878,020.32 and 345,865.53 is: 477,303.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,234.43 : 878,020.32 = 345,865.53 : x
  2. Step 2: Convert to fraction form
    636,234.43/878,020.32 = 345,865.53/x
  3. Step 3: Cross multiply
    636,234.43x = 878,020.32 × 345,865.53
  4. Step 4: Simplify right side
    636,234.43x = 303,676,963,327.57
  5. Step 5: Solve for x
    x = 303,676,963,327.57/636,234.43
  6. Step 6: Final answer
    x = 477,303.57

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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.