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Finding the Fourth Proportional to 440.81, 608.06 and 388.48

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Solution

The fourth proportional to 440.81, 608.06 and 388.48 is: 535.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.81 : 608.06 = 388.48 : x
  2. Step 2: Convert to fraction form
    440.81/608.06 = 388.48/x
  3. Step 3: Cross multiply
    440.81x = 608.06 × 388.48
  4. Step 4: Simplify right side
    440.81x = 236,219.15
  5. Step 5: Solve for x
    x = 236,219.15/440.81
  6. Step 6: Final answer
    x = 535.88

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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.