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Finding the Fourth Proportional to 620.68, 930.67 and 255.72

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Solution

The fourth proportional to 620.68, 930.67 and 255.72 is: 383.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.68 : 930.67 = 255.72 : x
  2. Step 2: Convert to fraction form
    620.68/930.67 = 255.72/x
  3. Step 3: Cross multiply
    620.68x = 930.67 × 255.72
  4. Step 4: Simplify right side
    620.68x = 237,989.65
  5. Step 5: Solve for x
    x = 237,989.65/620.68
  6. Step 6: Final answer
    x = 383.43

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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.