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Finding the Fourth Proportional to 309.17, 426.93 and 253.82

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Solution

The fourth proportional to 309.17, 426.93 and 253.82 is: 350.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.17 : 426.93 = 253.82 : x
  2. Step 2: Convert to fraction form
    309.17/426.93 = 253.82/x
  3. Step 3: Cross multiply
    309.17x = 426.93 × 253.82
  4. Step 4: Simplify right side
    309.17x = 108,363.37
  5. Step 5: Solve for x
    x = 108,363.37/309.17
  6. Step 6: Final answer
    x = 350.50

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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.