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Finding the Fourth Proportional to 486.04, 670.66 and 279

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Solution

The fourth proportional to 486.04, 670.66 and 279 is: 384.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.04 : 670.66 = 279 : x
  2. Step 2: Convert to fraction form
    486.04/670.66 = 279/x
  3. Step 3: Cross multiply
    486.04x = 670.66 × 279
  4. Step 4: Simplify right side
    486.04x = 187,114.14
  5. Step 5: Solve for x
    x = 187,114.14/486.04
  6. Step 6: Final answer
    x = 384.98

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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.