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Finding the Fourth Proportional to 643.77, 888.45 and 364.05

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Solution

The fourth proportional to 643.77, 888.45 and 364.05 is: 502.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.77 : 888.45 = 364.05 : x
  2. Step 2: Convert to fraction form
    643.77/888.45 = 364.05/x
  3. Step 3: Cross multiply
    643.77x = 888.45 × 364.05
  4. Step 4: Simplify right side
    643.77x = 323,440.22
  5. Step 5: Solve for x
    x = 323,440.22/643.77
  6. Step 6: Final answer
    x = 502.42

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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.