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Finding the Fourth Proportional to 622.43, 856.41 and 474.20

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Solution

The fourth proportional to 622.43, 856.41 and 474.20 is: 652.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.43 : 856.41 = 474.20 : x
  2. Step 2: Convert to fraction form
    622.43/856.41 = 474.20/x
  3. Step 3: Cross multiply
    622.43x = 856.41 × 474.20
  4. Step 4: Simplify right side
    622.43x = 406,109.62
  5. Step 5: Solve for x
    x = 406,109.62/622.43
  6. Step 6: Final answer
    x = 652.46

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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.