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Finding the Fourth Proportional to 636,304.20, 878,090.34 and 345,906.12

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Solution

The fourth proportional to 636,304.20, 878,090.34 and 345,906.12 is: 477,345.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,304.20 : 878,090.34 = 345,906.12 : x
  2. Step 2: Convert to fraction form
    636,304.20/878,090.34 = 345,906.12/x
  3. Step 3: Cross multiply
    636,304.20x = 878,090.34 × 345,906.12
  4. Step 4: Simplify right side
    636,304.20x = 303,736,822,518.88
  5. Step 5: Solve for x
    x = 303,736,822,518.88/636,304.20
  6. Step 6: Final answer
    x = 477,345.31

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1.5x scale

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.