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Finding the Fourth Proportional to 371.35, 554.28 and 279.62

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Solution

The fourth proportional to 371.35, 554.28 and 279.62 is: 417.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.35 : 554.28 = 279.62 : x
  2. Step 2: Convert to fraction form
    371.35/554.28 = 279.62/x
  3. Step 3: Cross multiply
    371.35x = 554.28 × 279.62
  4. Step 4: Simplify right side
    371.35x = 154,986.03
  5. Step 5: Solve for x
    x = 154,986.03/371.35
  6. Step 6: Final answer
    x = 417.36

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.