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Finding the Fourth Proportional to 622.59, 859.47 and 401.92

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Solution

The fourth proportional to 622.59, 859.47 and 401.92 is: 554.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.59 : 859.47 = 401.92 : x
  2. Step 2: Convert to fraction form
    622.59/859.47 = 401.92/x
  3. Step 3: Cross multiply
    622.59x = 859.47 × 401.92
  4. Step 4: Simplify right side
    622.59x = 345,438.18
  5. Step 5: Solve for x
    x = 345,438.18/622.59
  6. Step 6: Final answer
    x = 554.84

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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.