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Finding the Fourth Proportional to 628.64, 942.24 and 281.90

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Solution

The fourth proportional to 628.64, 942.24 and 281.90 is: 422.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.64 : 942.24 = 281.90 : x
  2. Step 2: Convert to fraction form
    628.64/942.24 = 281.90/x
  3. Step 3: Cross multiply
    628.64x = 942.24 × 281.90
  4. Step 4: Simplify right side
    628.64x = 265,617.46
  5. Step 5: Solve for x
    x = 265,617.46/628.64
  6. Step 6: Final answer
    x = 422.53

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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.