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Finding the Fourth Proportional to 637.48, 955.26 and 420.28

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Solution

The fourth proportional to 637.48, 955.26 and 420.28 is: 629.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    637.48 : 955.26 = 420.28 : x
  2. Step 2: Convert to fraction form
    637.48/955.26 = 420.28/x
  3. Step 3: Cross multiply
    637.48x = 955.26 × 420.28
  4. Step 4: Simplify right side
    637.48x = 401,476.67
  5. Step 5: Solve for x
    x = 401,476.67/637.48
  6. Step 6: Final answer
    x = 629.79

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1.5x scale

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.