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Finding the Fourth Proportional to 279.93, 385.32 and 242.94

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Solution

The fourth proportional to 279.93, 385.32 and 242.94 is: 334.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279.93 : 385.32 = 242.94 : x
  2. Step 2: Convert to fraction form
    279.93/385.32 = 242.94/x
  3. Step 3: Cross multiply
    279.93x = 385.32 × 242.94
  4. Step 4: Simplify right side
    279.93x = 93,609.64
  5. Step 5: Solve for x
    x = 93,609.64/279.93
  6. Step 6: Final answer
    x = 334.40

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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.