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Finding the Fourth Proportional to 628.35, 867.08 and 348.57

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Solution

The fourth proportional to 628.35, 867.08 and 348.57 is: 481.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.35 : 867.08 = 348.57 : x
  2. Step 2: Convert to fraction form
    628.35/867.08 = 348.57/x
  3. Step 3: Cross multiply
    628.35x = 867.08 × 348.57
  4. Step 4: Simplify right side
    628.35x = 302,239.76
  5. Step 5: Solve for x
    x = 302,239.76/628.35
  6. Step 6: Final answer
    x = 481.01

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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.