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Finding the Fourth Proportional to 622.31, 933.57 and 256.89

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Solution

The fourth proportional to 622.31, 933.57 and 256.89 is: 385.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    622.31 : 933.57 = 256.89 : x
  2. Step 2: Convert to fraction form
    622.31/933.57 = 256.89/x
  3. Step 3: Cross multiply
    622.31x = 933.57 × 256.89
  4. Step 4: Simplify right side
    622.31x = 239,824.80
  5. Step 5: Solve for x
    x = 239,824.80/622.31
  6. Step 6: Final answer
    x = 385.38

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1.5x scale

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.