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Finding the Fourth Proportional to 638,560.80, 958,213.98 and 354,490.56

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Solution

The fourth proportional to 638,560.80, 958,213.98 and 354,490.56 is: 531,942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,560.80 : 958,213.98 = 354,490.56 : x
  2. Step 2: Convert to fraction form
    638,560.80/958,213.98 = 354,490.56/x
  3. Step 3: Cross multiply
    638,560.80x = 958,213.98 × 354,490.56
  4. Step 4: Simplify right side
    638,560.80x = 339,677,810,370.03
  5. Step 5: Solve for x
    x = 339,677,810,370.03/638,560.80
  6. Step 6: Final answer
    x = 531,942.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.