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Finding the Fourth Proportional to 622, 858.36 and 342.24

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Solution

The fourth proportional to 622, 858.36 and 342.24 is: 472.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    622 : 858.36 = 342.24 : x
  2. Step 2: Convert to fraction form
    622/858.36 = 342.24/x
  3. Step 3: Cross multiply
    622x = 858.36 × 342.24
  4. Step 4: Simplify right side
    622x = 293,765.13
  5. Step 5: Solve for x
    x = 293,765.13/622
  6. Step 6: Final answer
    x = 472.29

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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.