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Finding the Fourth Proportional to 479.24, 661.36 and 272.24

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Solution

The fourth proportional to 479.24, 661.36 and 272.24 is: 375.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.24 : 661.36 = 272.24 : x
  2. Step 2: Convert to fraction form
    479.24/661.36 = 272.24/x
  3. Step 3: Cross multiply
    479.24x = 661.36 × 272.24
  4. Step 4: Simplify right side
    479.24x = 180,048.65
  5. Step 5: Solve for x
    x = 180,048.65/479.24
  6. Step 6: Final answer
    x = 375.70

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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.