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Finding the Fourth Proportional to 628.60, 940.74 and 484.60

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Solution

The fourth proportional to 628.60, 940.74 and 484.60 is: 725.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.60 : 940.74 = 484.60 : x
  2. Step 2: Convert to fraction form
    628.60/940.74 = 484.60/x
  3. Step 3: Cross multiply
    628.60x = 940.74 × 484.60
  4. Step 4: Simplify right side
    628.60x = 455,882.60
  5. Step 5: Solve for x
    x = 455,882.60/628.60
  6. Step 6: Final answer
    x = 725.23

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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.