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Finding the Fourth Proportional to 622.89, 859.41 and 447.93

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Solution

The fourth proportional to 622.89, 859.41 and 447.93 is: 618.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.89 : 859.41 = 447.93 : x
  2. Step 2: Convert to fraction form
    622.89/859.41 = 447.93/x
  3. Step 3: Cross multiply
    622.89x = 859.41 × 447.93
  4. Step 4: Simplify right side
    622.89x = 384,955.52
  5. Step 5: Solve for x
    x = 384,955.52/622.89
  6. Step 6: Final answer
    x = 618.02

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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.