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Finding the Fourth Proportional to 479.17, 661.12 and 304.62

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Solution

The fourth proportional to 479.17, 661.12 and 304.62 is: 420.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.17 : 661.12 = 304.62 : x
  2. Step 2: Convert to fraction form
    479.17/661.12 = 304.62/x
  3. Step 3: Cross multiply
    479.17x = 661.12 × 304.62
  4. Step 4: Simplify right side
    479.17x = 201,390.37
  5. Step 5: Solve for x
    x = 201,390.37/479.17
  6. Step 6: Final answer
    x = 420.29

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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.