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Finding the Fourth Proportional to 479.00, 661.00 and 279.85

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Solution

The fourth proportional to 479.00, 661.00 and 279.85 is: 386.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.00 : 661.00 = 279.85 : x
  2. Step 2: Convert to fraction form
    479.00/661.00 = 279.85/x
  3. Step 3: Cross multiply
    479.00x = 661.00 × 279.85
  4. Step 4: Simplify right side
    479.00x = 184,978.46
  5. Step 5: Solve for x
    x = 184,978.46/479.00
  6. Step 6: Final answer
    x = 386.17

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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.