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Finding the Fourth Proportional to 620.93, 931.03 and 255.28

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Solution

The fourth proportional to 620.93, 931.03 and 255.28 is: 382.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.93 : 931.03 = 255.28 : x
  2. Step 2: Convert to fraction form
    620.93/931.03 = 255.28/x
  3. Step 3: Cross multiply
    620.93x = 931.03 × 255.28
  4. Step 4: Simplify right side
    620.93x = 237,673.34
  5. Step 5: Solve for x
    x = 237,673.34/620.93
  6. Step 6: Final answer
    x = 382.77

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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.