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Finding the Fourth Proportional to 654.27, 902.72 and 388.64

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Solution

The fourth proportional to 654.27, 902.72 and 388.64 is: 536.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    654.27 : 902.72 = 388.64 : x
  2. Step 2: Convert to fraction form
    654.27/902.72 = 388.64/x
  3. Step 3: Cross multiply
    654.27x = 902.72 × 388.64
  4. Step 4: Simplify right side
    654.27x = 350,833.41
  5. Step 5: Solve for x
    x = 350,833.41/654.27
  6. Step 6: Final answer
    x = 536.22

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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.