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Finding the Fourth Proportional to 479.63, 661.89 and 272.63

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Solution

The fourth proportional to 479.63, 661.89 and 272.63 is: 376.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.63 : 661.89 = 272.63 : x
  2. Step 2: Convert to fraction form
    479.63/661.89 = 272.63/x
  3. Step 3: Cross multiply
    479.63x = 661.89 × 272.63
  4. Step 4: Simplify right side
    479.63x = 180,447.76
  5. Step 5: Solve for x
    x = 180,447.76/479.63
  6. Step 6: Final answer
    x = 376.23

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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.