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Finding the Fourth Proportional to 643.96, 888.68 and 360.37

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Solution

The fourth proportional to 643.96, 888.68 and 360.37 is: 497.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.96 : 888.68 = 360.37 : x
  2. Step 2: Convert to fraction form
    643.96/888.68 = 360.37/x
  3. Step 3: Cross multiply
    643.96x = 888.68 × 360.37
  4. Step 4: Simplify right side
    643.96x = 320,249.59
  5. Step 5: Solve for x
    x = 320,249.59/643.96
  6. Step 6: Final answer
    x = 497.31

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1.5x scale

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.