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Finding the Fourth Proportional to 627.98, 939.80 and 483.98

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Solution

The fourth proportional to 627.98, 939.80 and 483.98 is: 724.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.98 : 939.80 = 483.98 : x
  2. Step 2: Convert to fraction form
    627.98/939.80 = 483.98/x
  3. Step 3: Cross multiply
    627.98x = 939.80 × 483.98
  4. Step 4: Simplify right side
    627.98x = 454,840.91
  5. Step 5: Solve for x
    x = 454,840.91/627.98
  6. Step 6: Final answer
    x = 724.30

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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.