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Finding the Fourth Proportional to 638,137.28, 880,635.36 and 351,667.64

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Solution

The fourth proportional to 638,137.28, 880,635.36 and 351,667.64 is: 485,304.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,137.28 : 880,635.36 = 351,667.64 : x
  2. Step 2: Convert to fraction form
    638,137.28/880,635.36 = 351,667.64/x
  3. Step 3: Cross multiply
    638,137.28x = 880,635.36 × 351,667.64
  4. Step 4: Simplify right side
    638,137.28x = 309,690,958,751.75
  5. Step 5: Solve for x
    x = 309,690,958,751.75/638,137.28
  6. Step 6: Final answer
    x = 485,304.60

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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.