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Finding the Fourth Proportional to 479.03, 661.06 and 279.91

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Solution

The fourth proportional to 479.03, 661.06 and 279.91 is: 386.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.03 : 661.06 = 279.91 : x
  2. Step 2: Convert to fraction form
    479.03/661.06 = 279.91/x
  3. Step 3: Cross multiply
    479.03x = 661.06 × 279.91
  4. Step 4: Simplify right side
    479.03x = 185,034.95
  5. Step 5: Solve for x
    x = 185,034.95/479.03
  6. Step 6: Final answer
    x = 386.27

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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.