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Finding the Fourth Proportional to 621.03, 931.57 and 274.19

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Solution

The fourth proportional to 621.03, 931.57 and 274.19 is: 411.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.03 : 931.57 = 274.19 : x
  2. Step 2: Convert to fraction form
    621.03/931.57 = 274.19/x
  3. Step 3: Cross multiply
    621.03x = 931.57 × 274.19
  4. Step 4: Simplify right side
    621.03x = 255,421.83
  5. Step 5: Solve for x
    x = 255,421.83/621.03
  6. Step 6: Final answer
    x = 411.28

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Double scale
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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.