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Finding the Fourth Proportional to 317,616.66, 438,118.57 and 188,470.21

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Solution

The fourth proportional to 317,616.66, 438,118.57 and 188,470.21 is: 259,974.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,616.66 : 438,118.57 = 188,470.21 : x
  2. Step 2: Convert to fraction form
    317,616.66/438,118.57 = 188,470.21/x
  3. Step 3: Cross multiply
    317,616.66x = 438,118.57 × 188,470.21
  4. Step 4: Simplify right side
    317,616.66x = 82,572,298,854.56
  5. Step 5: Solve for x
    x = 82,572,298,854.56/317,616.66
  6. Step 6: Final answer
    x = 259,974.71

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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.