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Finding the Fourth Proportional to 622.80, 933.54 and 257.22

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Solution

The fourth proportional to 622.80, 933.54 and 257.22 is: 385.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.80 : 933.54 = 257.22 : x
  2. Step 2: Convert to fraction form
    622.80/933.54 = 257.22/x
  3. Step 3: Cross multiply
    622.80x = 933.54 × 257.22
  4. Step 4: Simplify right side
    622.80x = 240,125.16
  5. Step 5: Solve for x
    x = 240,125.16/622.80
  6. Step 6: Final answer
    x = 385.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.