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Finding the Fourth Proportional to 643.23, 888.33 and 446.40

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Solution

The fourth proportional to 643.23, 888.33 and 446.40 is: 616.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.23 : 888.33 = 446.40 : x
  2. Step 2: Convert to fraction form
    643.23/888.33 = 446.40/x
  3. Step 3: Cross multiply
    643.23x = 888.33 × 446.40
  4. Step 4: Simplify right side
    643.23x = 396,550.51
  5. Step 5: Solve for x
    x = 396,550.51/643.23
  6. Step 6: Final answer
    x = 616.50

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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.