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Finding the Fourth Proportional to 620.67, 931.41 and 274.23

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Solution

The fourth proportional to 620.67, 931.41 and 274.23 is: 411.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    620.67 : 931.41 = 274.23 : x
  2. Step 2: Convert to fraction form
    620.67/931.41 = 274.23/x
  3. Step 3: Cross multiply
    620.67x = 931.41 × 274.23
  4. Step 4: Simplify right side
    620.67x = 255,420.56
  5. Step 5: Solve for x
    x = 255,420.56/620.67
  6. Step 6: Final answer
    x = 411.52

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Similar ratio
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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.