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Finding the Fourth Proportional to 643.76, 888.43 and 364.01

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Solution

The fourth proportional to 643.76, 888.43 and 364.01 is: 502.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.76 : 888.43 = 364.01 : x
  2. Step 2: Convert to fraction form
    643.76/888.43 = 364.01/x
  3. Step 3: Cross multiply
    643.76x = 888.43 × 364.01
  4. Step 4: Simplify right side
    643.76x = 323,398.72
  5. Step 5: Solve for x
    x = 323,398.72/643.76
  6. Step 6: Final answer
    x = 502.36

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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.