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Finding the Fourth Proportional to 638,082.70, 880,572.65 and 351,621.26

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Solution

The fourth proportional to 638,082.70, 880,572.65 and 351,621.26 is: 485,247.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,082.70 : 880,572.65 = 351,621.26 : x
  2. Step 2: Convert to fraction form
    638,082.70/880,572.65 = 351,621.26/x
  3. Step 3: Cross multiply
    638,082.70x = 880,572.65 × 351,621.26
  4. Step 4: Simplify right side
    638,082.70x = 309,628,062,956.43
  5. Step 5: Solve for x
    x = 309,628,062,956.43/638,082.70
  6. Step 6: Final answer
    x = 485,247.55

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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.