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Finding the Fourth Proportional to 626.40, 940.20 and 535.20

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Solution

The fourth proportional to 626.40, 940.20 and 535.20 is: 803.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.40 : 940.20 = 535.20 : x
  2. Step 2: Convert to fraction form
    626.40/940.20 = 535.20/x
  3. Step 3: Cross multiply
    626.40x = 940.20 × 535.20
  4. Step 4: Simplify right side
    626.40x = 503,195.04
  5. Step 5: Solve for x
    x = 503,195.04/626.40
  6. Step 6: Final answer
    x = 803.31

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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.