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Finding the Fourth Proportional to 279.88, 386.44 and 210.06

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Solution

The fourth proportional to 279.88, 386.44 and 210.06 is: 290.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.88 : 386.44 = 210.06 : x
  2. Step 2: Convert to fraction form
    279.88/386.44 = 210.06/x
  3. Step 3: Cross multiply
    279.88x = 386.44 × 210.06
  4. Step 4: Simplify right side
    279.88x = 81,175.06
  5. Step 5: Solve for x
    x = 81,175.06/279.88
  6. Step 6: Final answer
    x = 290.04

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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.