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Finding the Fourth Proportional to 628.73, 867.51 and 380.00

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Solution

The fourth proportional to 628.73, 867.51 and 380.00 is: 524.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.73 : 867.51 = 380.00 : x
  2. Step 2: Convert to fraction form
    628.73/867.51 = 380.00/x
  3. Step 3: Cross multiply
    628.73x = 867.51 × 380.00
  4. Step 4: Simplify right side
    628.73x = 329,648.04
  5. Step 5: Solve for x
    x = 329,648.04/628.73
  6. Step 6: Final answer
    x = 524.31

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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.