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Finding the Fourth Proportional to 279.14, 385.04 and 172.83

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Solution

The fourth proportional to 279.14, 385.04 and 172.83 is: 238.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.14 : 385.04 = 172.83 : x
  2. Step 2: Convert to fraction form
    279.14/385.04 = 172.83/x
  3. Step 3: Cross multiply
    279.14x = 385.04 × 172.83
  4. Step 4: Simplify right side
    279.14x = 66,547.62
  5. Step 5: Solve for x
    x = 66,547.62/279.14
  6. Step 6: Final answer
    x = 238.41

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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.