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Finding the Fourth Proportional to 637.24, 955.66 and 421.96

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Solution

The fourth proportional to 637.24, 955.66 and 421.96 is: 632.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.24 : 955.66 = 421.96 : x
  2. Step 2: Convert to fraction form
    637.24/955.66 = 421.96/x
  3. Step 3: Cross multiply
    637.24x = 955.66 × 421.96
  4. Step 4: Simplify right side
    637.24x = 403,250.29
  5. Step 5: Solve for x
    x = 403,250.29/637.24
  6. Step 6: Final answer
    x = 632.81

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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.