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Finding the Fourth Proportional to 622.14, 858.28 and 385.93

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Solution

The fourth proportional to 622.14, 858.28 and 385.93 is: 532.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.14 : 858.28 = 385.93 : x
  2. Step 2: Convert to fraction form
    622.14/858.28 = 385.93/x
  3. Step 3: Cross multiply
    622.14x = 858.28 × 385.93
  4. Step 4: Simplify right side
    622.14x = 331,236.00
  5. Step 5: Solve for x
    x = 331,236.00/622.14
  6. Step 6: Final answer
    x = 532.41

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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.