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Finding the Fourth Proportional to 638,188.56, 880,700.20 and 351,708.64

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Solution

The fourth proportional to 638,188.56, 880,700.20 and 351,708.64 is: 485,357.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,188.56 : 880,700.20 = 351,708.64 : x
  2. Step 2: Convert to fraction form
    638,188.56/880,700.20 = 351,708.64/x
  3. Step 3: Cross multiply
    638,188.56x = 880,700.20 × 351,708.64
  4. Step 4: Simplify right side
    638,188.56x = 309,749,869,589.73
  5. Step 5: Solve for x
    x = 309,749,869,589.73/638,188.56
  6. Step 6: Final answer
    x = 485,357.92

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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.