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Finding the Fourth Proportional to 628.64, 867.32 and 363.05

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Solution

The fourth proportional to 628.64, 867.32 and 363.05 is: 500.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.64 : 867.32 = 363.05 : x
  2. Step 2: Convert to fraction form
    628.64/867.32 = 363.05/x
  3. Step 3: Cross multiply
    628.64x = 867.32 × 363.05
  4. Step 4: Simplify right side
    628.64x = 314,876.19
  5. Step 5: Solve for x
    x = 314,876.19/628.64
  6. Step 6: Final answer
    x = 500.89

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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.