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Finding the Fourth Proportional to 626.84, 939.86 and 210.32

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Solution

The fourth proportional to 626.84, 939.86 and 210.32 is: 315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.84 : 939.86 = 210.32 : x
  2. Step 2: Convert to fraction form
    626.84/939.86 = 210.32/x
  3. Step 3: Cross multiply
    626.84x = 939.86 × 210.32
  4. Step 4: Simplify right side
    626.84x = 197,671.36
  5. Step 5: Solve for x
    x = 197,671.36/626.84
  6. Step 6: Final answer
    x = 315.35

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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.