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Finding the Fourth Proportional to 421.13, 630.63 and 352.48

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Solution

The fourth proportional to 421.13, 630.63 and 352.48 is: 527.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    421.13 : 630.63 = 352.48 : x
  2. Step 2: Convert to fraction form
    421.13/630.63 = 352.48/x
  3. Step 3: Cross multiply
    421.13x = 630.63 × 352.48
  4. Step 4: Simplify right side
    421.13x = 222,282.70
  5. Step 5: Solve for x
    x = 222,282.70/421.13
  6. Step 6: Final answer
    x = 527.82

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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.