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Finding the Fourth Proportional to 479.18, 661.01 and 282.66

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Solution

The fourth proportional to 479.18, 661.01 and 282.66 is: 389.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.18 : 661.01 = 282.66 : x
  2. Step 2: Convert to fraction form
    479.18/661.01 = 282.66/x
  3. Step 3: Cross multiply
    479.18x = 661.01 × 282.66
  4. Step 4: Simplify right side
    479.18x = 186,841.09
  5. Step 5: Solve for x
    x = 186,841.09/479.18
  6. Step 6: Final answer
    x = 389.92

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.