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Finding the Fourth Proportional to 309.15, 426.62 and 184.91

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Solution

The fourth proportional to 309.15, 426.62 and 184.91 is: 255.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.15 : 426.62 = 184.91 : x
  2. Step 2: Convert to fraction form
    309.15/426.62 = 184.91/x
  3. Step 3: Cross multiply
    309.15x = 426.62 × 184.91
  4. Step 4: Simplify right side
    309.15x = 78,884.63
  5. Step 5: Solve for x
    x = 78,884.63/309.15
  6. Step 6: Final answer
    x = 255.17

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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.