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Finding the Fourth Proportional to 474.81, 655.19 and 275.60

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Solution

The fourth proportional to 474.81, 655.19 and 275.60 is: 380.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.81 : 655.19 = 275.60 : x
  2. Step 2: Convert to fraction form
    474.81/655.19 = 275.60/x
  3. Step 3: Cross multiply
    474.81x = 655.19 × 275.60
  4. Step 4: Simplify right side
    474.81x = 180,571.66
  5. Step 5: Solve for x
    x = 180,571.66/474.81
  6. Step 6: Final answer
    x = 380.31

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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.