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Finding the Fourth Proportional to 628.08, 937.20 and 621.60

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Solution

The fourth proportional to 628.08, 937.20 and 621.60 is: 927.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.08 : 937.20 = 621.60 : x
  2. Step 2: Convert to fraction form
    628.08/937.20 = 621.60/x
  3. Step 3: Cross multiply
    628.08x = 937.20 × 621.60
  4. Step 4: Simplify right side
    628.08x = 582,563.52
  5. Step 5: Solve for x
    x = 582,563.52/628.08
  6. Step 6: Final answer
    x = 927.53

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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.