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Finding the Fourth Proportional to 628.55, 867.41 and 348.79

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Solution

The fourth proportional to 628.55, 867.41 and 348.79 is: 481.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.55 : 867.41 = 348.79 : x
  2. Step 2: Convert to fraction form
    628.55/867.41 = 348.79/x
  3. Step 3: Cross multiply
    628.55x = 867.41 × 348.79
  4. Step 4: Simplify right side
    628.55x = 302,543.93
  5. Step 5: Solve for x
    x = 302,543.93/628.55
  6. Step 6: Final answer
    x = 481.34

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.