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Finding the Fourth Proportional to 309.11, 425.70 and 293.45

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Solution

The fourth proportional to 309.11, 425.70 and 293.45 is: 404.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.11 : 425.70 = 293.45 : x
  2. Step 2: Convert to fraction form
    309.11/425.70 = 293.45/x
  3. Step 3: Cross multiply
    309.11x = 425.70 × 293.45
  4. Step 4: Simplify right side
    309.11x = 124,919.54
  5. Step 5: Solve for x
    x = 124,919.54/309.11
  6. Step 6: Final answer
    x = 404.13

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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.