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Finding the Fourth Proportional to 309.84, 426.51 and 277.44

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Solution

The fourth proportional to 309.84, 426.51 and 277.44 is: 381.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.84 : 426.51 = 277.44 : x
  2. Step 2: Convert to fraction form
    309.84/426.51 = 277.44/x
  3. Step 3: Cross multiply
    309.84x = 426.51 × 277.44
  4. Step 4: Simplify right side
    309.84x = 118,330.93
  5. Step 5: Solve for x
    x = 118,330.93/309.84
  6. Step 6: Final answer
    x = 381.91

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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.