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Finding the Fourth Proportional to 304.31, 419.49 and 253.95

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Solution

The fourth proportional to 304.31, 419.49 and 253.95 is: 350.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    304.31 : 419.49 = 253.95 : x
  2. Step 2: Convert to fraction form
    304.31/419.49 = 253.95/x
  3. Step 3: Cross multiply
    304.31x = 419.49 × 253.95
  4. Step 4: Simplify right side
    304.31x = 106,529.49
  5. Step 5: Solve for x
    x = 106,529.49/304.31
  6. Step 6: Final answer
    x = 350.07

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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.