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Finding the Fourth Proportional to 638,400, 880,998.08 and 351,930.36

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Solution

The fourth proportional to 638,400, 880,998.08 and 351,930.36 is: 485,667.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,400 : 880,998.08 = 351,930.36 : x
  2. Step 2: Convert to fraction form
    638,400/880,998.08 = 351,930.36/x
  3. Step 3: Cross multiply
    638,400x = 880,998.08 × 351,930.36
  4. Step 4: Simplify right side
    638,400x = 310,049,969,694.06
  5. Step 5: Solve for x
    x = 310,049,969,694.06/638,400
  6. Step 6: Final answer
    x = 485,667.25

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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.