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Finding the Fourth Proportional to 474.81, 712.36 and 231.30

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Solution

The fourth proportional to 474.81, 712.36 and 231.30 is: 347.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.81 : 712.36 = 231.30 : x
  2. Step 2: Convert to fraction form
    474.81/712.36 = 231.30/x
  3. Step 3: Cross multiply
    474.81x = 712.36 × 231.30
  4. Step 4: Simplify right side
    474.81x = 164,768.87
  5. Step 5: Solve for x
    x = 164,768.87/474.81
  6. Step 6: Final answer
    x = 347.02

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.