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Finding the Fourth Proportional to 626.36, 939.53 and 279.61

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Solution

The fourth proportional to 626.36, 939.53 and 279.61 is: 419.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.36 : 939.53 = 279.61 : x
  2. Step 2: Convert to fraction form
    626.36/939.53 = 279.61/x
  3. Step 3: Cross multiply
    626.36x = 939.53 × 279.61
  4. Step 4: Simplify right side
    626.36x = 262,697.29
  5. Step 5: Solve for x
    x = 262,697.29/626.36
  6. Step 6: Final answer
    x = 419.40

Related Problems

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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.