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Finding the Fourth Proportional to 279.03, 385.06 and 153

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Solution

The fourth proportional to 279.03, 385.06 and 153 is: 211.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.03 : 385.06 = 153 : x
  2. Step 2: Convert to fraction form
    279.03/385.06 = 153/x
  3. Step 3: Cross multiply
    279.03x = 385.06 × 153
  4. Step 4: Simplify right side
    279.03x = 58,914.18
  5. Step 5: Solve for x
    x = 58,914.18/279.03
  6. Step 6: Final answer
    x = 211.14

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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.