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Finding the Fourth Proportional to 628.75, 867.67 and 348.99

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Solution

The fourth proportional to 628.75, 867.67 and 348.99 is: 481.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.75 : 867.67 = 348.99 : x
  2. Step 2: Convert to fraction form
    628.75/867.67 = 348.99/x
  3. Step 3: Cross multiply
    628.75x = 867.67 × 348.99
  4. Step 4: Simplify right side
    628.75x = 302,807.70
  5. Step 5: Solve for x
    x = 302,807.70/628.75
  6. Step 6: Final answer
    x = 481.61

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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.