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Finding the Fourth Proportional to 627.10, 940.65 and 556.90

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Solution

The fourth proportional to 627.10, 940.65 and 556.90 is: 835.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.10 : 940.65 = 556.90 : x
  2. Step 2: Convert to fraction form
    627.10/940.65 = 556.90/x
  3. Step 3: Cross multiply
    627.10x = 940.65 × 556.90
  4. Step 4: Simplify right side
    627.10x = 523,847.99
  5. Step 5: Solve for x
    x = 523,847.99/627.10
  6. Step 6: Final answer
    x = 835.35

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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.