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Finding the Fourth Proportional to 626.15, 939.93 and 318.35

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Solution

The fourth proportional to 626.15, 939.93 and 318.35 is: 477.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.15 : 939.93 = 318.35 : x
  2. Step 2: Convert to fraction form
    626.15/939.93 = 318.35/x
  3. Step 3: Cross multiply
    626.15x = 939.93 × 318.35
  4. Step 4: Simplify right side
    626.15x = 299,222.02
  5. Step 5: Solve for x
    x = 299,222.02/626.15
  6. Step 6: Final answer
    x = 477.88

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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.