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Finding the Fourth Proportional to 643.26, 886.98 and 444.18

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Solution

The fourth proportional to 643.26, 886.98 and 444.18 is: 612.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    643.26 : 886.98 = 444.18 : x
  2. Step 2: Convert to fraction form
    643.26/886.98 = 444.18/x
  3. Step 3: Cross multiply
    643.26x = 886.98 × 444.18
  4. Step 4: Simplify right side
    643.26x = 393,978.78
  5. Step 5: Solve for x
    x = 393,978.78/643.26
  6. Step 6: Final answer
    x = 612.47

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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.