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Finding the Fourth Proportional to 622.71, 859.17 and 401.48

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Solution

The fourth proportional to 622.71, 859.17 and 401.48 is: 553.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.71 : 859.17 = 401.48 : x
  2. Step 2: Convert to fraction form
    622.71/859.17 = 401.48/x
  3. Step 3: Cross multiply
    622.71x = 859.17 × 401.48
  4. Step 4: Simplify right side
    622.71x = 344,939.57
  5. Step 5: Solve for x
    x = 344,939.57/622.71
  6. Step 6: Final answer
    x = 553.93

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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.