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Finding the Fourth Proportional to 636,285.90, 878,080.26 and 345,898.03

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Solution

The fourth proportional to 636,285.90, 878,080.26 and 345,898.03 is: 477,342.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,285.90 : 878,080.26 = 345,898.03 : x
  2. Step 2: Convert to fraction form
    636,285.90/878,080.26 = 345,898.03/x
  3. Step 3: Cross multiply
    636,285.90x = 878,080.26 × 345,898.03
  4. Step 4: Simplify right side
    636,285.90x = 303,726,232,115.89
  5. Step 5: Solve for x
    x = 303,726,232,115.89/636,285.90
  6. Step 6: Final answer
    x = 477,342.39

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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.