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Finding the Fourth Proportional to 628.45, 867.27 and 379.74

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Solution

The fourth proportional to 628.45, 867.27 and 379.74 is: 524.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.45 : 867.27 = 379.74 : x
  2. Step 2: Convert to fraction form
    628.45/867.27 = 379.74/x
  3. Step 3: Cross multiply
    628.45x = 867.27 × 379.74
  4. Step 4: Simplify right side
    628.45x = 329,332.77
  5. Step 5: Solve for x
    x = 329,332.77/628.45
  6. Step 6: Final answer
    x = 524.04

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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.