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Finding the Fourth Proportional to 636,249.56, 878,041.20 and 345,880.66

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Solution

The fourth proportional to 636,249.56, 878,041.20 and 345,880.66 is: 477,324.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    636,249.56 : 878,041.20 = 345,880.66 : x
  2. Step 2: Convert to fraction form
    636,249.56/878,041.20 = 345,880.66/x
  3. Step 3: Cross multiply
    636,249.56x = 878,041.20 × 345,880.66
  4. Step 4: Simplify right side
    636,249.56x = 303,697,469,763.19
  5. Step 5: Solve for x
    x = 303,697,469,763.19/636,249.56
  6. Step 6: Final answer
    x = 477,324.45

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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.