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Finding the Fourth Proportional to 638,082.18, 880,571.94 and 351,620.76

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Solution

The fourth proportional to 638,082.18, 880,571.94 and 351,620.76 is: 485,246.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,082.18 : 880,571.94 = 351,620.76 : x
  2. Step 2: Convert to fraction form
    638,082.18/880,571.94 = 351,620.76/x
  3. Step 3: Cross multiply
    638,082.18x = 880,571.94 × 351,620.76
  4. Step 4: Simplify right side
    638,082.18x = 309,627,374,777.47
  5. Step 5: Solve for x
    x = 309,627,374,777.47/638,082.18
  6. Step 6: Final answer
    x = 485,246.86

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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.