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Finding the Fourth Proportional to 627.28, 940.20 and 555.28

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Solution

The fourth proportional to 627.28, 940.20 and 555.28 is: 832.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    627.28 : 940.20 = 555.28 : x
  2. Step 2: Convert to fraction form
    627.28/940.20 = 555.28/x
  3. Step 3: Cross multiply
    627.28x = 940.20 × 555.28
  4. Step 4: Simplify right side
    627.28x = 522,074.26
  5. Step 5: Solve for x
    x = 522,074.26/627.28
  6. Step 6: Final answer
    x = 832.28

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Double scale
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1.5x scale

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.