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Finding the Fourth Proportional to 472.85, 709.28 and 148.22

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Solution

The fourth proportional to 472.85, 709.28 and 148.22 is: 222.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    472.85 : 709.28 = 148.22 : x
  2. Step 2: Convert to fraction form
    472.85/709.28 = 148.22/x
  3. Step 3: Cross multiply
    472.85x = 709.28 × 148.22
  4. Step 4: Simplify right side
    472.85x = 105,129.48
  5. Step 5: Solve for x
    x = 105,129.48/472.85
  6. Step 6: Final answer
    x = 222.33

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