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Finding the Fourth Proportional to 621.26, 931.88 and 165.26

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Solution

The fourth proportional to 621.26, 931.88 and 165.26 is: 247.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    621.26 : 931.88 = 165.26 : x
  2. Step 2: Convert to fraction form
    621.26/931.88 = 165.26/x
  3. Step 3: Cross multiply
    621.26x = 931.88 × 165.26
  4. Step 4: Simplify right side
    621.26x = 154,002.49
  5. Step 5: Solve for x
    x = 154,002.49/621.26
  6. Step 6: Final answer
    x = 247.89

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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.