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Finding the Fourth Proportional to 628.70, 867.51 and 348.91

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Solution

The fourth proportional to 628.70, 867.51 and 348.91 is: 481.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.70 : 867.51 = 348.91 : x
  2. Step 2: Convert to fraction form
    628.70/867.51 = 348.91/x
  3. Step 3: Cross multiply
    628.70x = 867.51 × 348.91
  4. Step 4: Simplify right side
    628.70x = 302,680.75
  5. Step 5: Solve for x
    x = 302,680.75/628.70
  6. Step 6: Final answer
    x = 481.44

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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.