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Finding the Fourth Proportional to 667.24, 920.77 and 368.51

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Solution

The fourth proportional to 667.24, 920.77 and 368.51 is: 508.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.24 : 920.77 = 368.51 : x
  2. Step 2: Convert to fraction form
    667.24/920.77 = 368.51/x
  3. Step 3: Cross multiply
    667.24x = 920.77 × 368.51
  4. Step 4: Simplify right side
    667.24x = 339,309.43
  5. Step 5: Solve for x
    x = 339,309.43/667.24
  6. Step 6: Final answer
    x = 508.53

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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.