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Finding the Fourth Proportional to 626.39, 939.18 and 549.51

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Solution

The fourth proportional to 626.39, 939.18 and 549.51 is: 823.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.39 : 939.18 = 549.51 : x
  2. Step 2: Convert to fraction form
    626.39/939.18 = 549.51/x
  3. Step 3: Cross multiply
    626.39x = 939.18 × 549.51
  4. Step 4: Simplify right side
    626.39x = 516,084.11
  5. Step 5: Solve for x
    x = 516,084.11/626.39
  6. Step 6: Final answer
    x = 823.91

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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.