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Finding the Fourth Proportional to 621.94, 933.10 and 256.75

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Solution

The fourth proportional to 621.94, 933.10 and 256.75 is: 385.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.94 : 933.10 = 256.75 : x
  2. Step 2: Convert to fraction form
    621.94/933.10 = 256.75/x
  3. Step 3: Cross multiply
    621.94x = 933.10 × 256.75
  4. Step 4: Simplify right side
    621.94x = 239,572.14
  5. Step 5: Solve for x
    x = 239,572.14/621.94
  6. Step 6: Final answer
    x = 385.20

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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.