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Finding the Fourth Proportional to 627.48, 936.90 and 554.58

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Solution

The fourth proportional to 627.48, 936.90 and 554.58 is: 828.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.48 : 936.90 = 554.58 : x
  2. Step 2: Convert to fraction form
    627.48/936.90 = 554.58/x
  3. Step 3: Cross multiply
    627.48x = 936.90 × 554.58
  4. Step 4: Simplify right side
    627.48x = 519,586.00
  5. Step 5: Solve for x
    x = 519,586.00/627.48
  6. Step 6: Final answer
    x = 828.05

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.