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Finding the Fourth Proportional to 421.55, 632.10 and 147.62

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Solution

The fourth proportional to 421.55, 632.10 and 147.62 is: 221.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.55 : 632.10 = 147.62 : x
  2. Step 2: Convert to fraction form
    421.55/632.10 = 147.62/x
  3. Step 3: Cross multiply
    421.55x = 632.10 × 147.62
  4. Step 4: Simplify right side
    421.55x = 93,312.74
  5. Step 5: Solve for x
    x = 93,312.74/421.55
  6. Step 6: Final answer
    x = 221.35

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