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Finding the Fourth Proportional to 622.44, 856.91 and 480.29

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Solution

The fourth proportional to 622.44, 856.91 and 480.29 is: 661.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.44 : 856.91 = 480.29 : x
  2. Step 2: Convert to fraction form
    622.44/856.91 = 480.29/x
  3. Step 3: Cross multiply
    622.44x = 856.91 × 480.29
  4. Step 4: Simplify right side
    622.44x = 411,562.22
  5. Step 5: Solve for x
    x = 411,562.22/622.44
  6. Step 6: Final answer
    x = 661.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.