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Finding the Fourth Proportional to 319.84, 441.58 and 253.72

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Solution

The fourth proportional to 319.84, 441.58 and 253.72 is: 350.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.84 : 441.58 = 253.72 : x
  2. Step 2: Convert to fraction form
    319.84/441.58 = 253.72/x
  3. Step 3: Cross multiply
    319.84x = 441.58 × 253.72
  4. Step 4: Simplify right side
    319.84x = 112,037.68
  5. Step 5: Solve for x
    x = 112,037.68/319.84
  6. Step 6: Final answer
    x = 350.29

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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.