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Finding the Fourth Proportional to 479.10, 661.11 and 282.60

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Solution

The fourth proportional to 479.10, 661.11 and 282.60 is: 389.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.10 : 661.11 = 282.60 : x
  2. Step 2: Convert to fraction form
    479.10/661.11 = 282.60/x
  3. Step 3: Cross multiply
    479.10x = 661.11 × 282.60
  4. Step 4: Simplify right side
    479.10x = 186,829.69
  5. Step 5: Solve for x
    x = 186,829.69/479.10
  6. Step 6: Final answer
    x = 389.96

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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.