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Finding the Fourth Proportional to 352.93, 487.07 and 309.19

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Solution

The fourth proportional to 352.93, 487.07 and 309.19 is: 426.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.93 : 487.07 = 309.19 : x
  2. Step 2: Convert to fraction form
    352.93/487.07 = 309.19/x
  3. Step 3: Cross multiply
    352.93x = 487.07 × 309.19
  4. Step 4: Simplify right side
    352.93x = 150,597.17
  5. Step 5: Solve for x
    x = 150,597.17/352.93
  6. Step 6: Final answer
    x = 426.71

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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.