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Finding the Fourth Proportional to 622.09, 858.47 and 338.50

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Solution

The fourth proportional to 622.09, 858.47 and 338.50 is: 467.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.09 : 858.47 = 338.50 : x
  2. Step 2: Convert to fraction form
    622.09/858.47 = 338.50/x
  3. Step 3: Cross multiply
    622.09x = 858.47 × 338.50
  4. Step 4: Simplify right side
    622.09x = 290,592.10
  5. Step 5: Solve for x
    x = 290,592.10/622.09
  6. Step 6: Final answer
    x = 467.12

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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.