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Finding the Fourth Proportional to 638,348.56, 880,920.80 and 351,873.42

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Solution

The fourth proportional to 638,348.56, 880,920.80 and 351,873.42 is: 485,585.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,348.56 : 880,920.80 = 351,873.42 : x
  2. Step 2: Convert to fraction form
    638,348.56/880,920.80 = 351,873.42/x
  3. Step 3: Cross multiply
    638,348.56x = 880,920.80 × 351,873.42
  4. Step 4: Simplify right side
    638,348.56x = 309,972,614,645.14
  5. Step 5: Solve for x
    x = 309,972,614,645.14/638,348.56
  6. Step 6: Final answer
    x = 485,585.20

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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.