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Finding the Fourth Proportional to 628.42, 942.78 and 262.99

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Solution

The fourth proportional to 628.42, 942.78 and 262.99 is: 394.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.42 : 942.78 = 262.99 : x
  2. Step 2: Convert to fraction form
    628.42/942.78 = 262.99/x
  3. Step 3: Cross multiply
    628.42x = 942.78 × 262.99
  4. Step 4: Simplify right side
    628.42x = 247,941.71
  5. Step 5: Solve for x
    x = 247,941.71/628.42
  6. Step 6: Final answer
    x = 394.55

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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.