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Finding the Fourth Proportional to 444.88, 612.48 and 386.64

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Solution

The fourth proportional to 444.88, 612.48 and 386.64 is: 532.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    444.88 : 612.48 = 386.64 : x
  2. Step 2: Convert to fraction form
    444.88/612.48 = 386.64/x
  3. Step 3: Cross multiply
    444.88x = 612.48 × 386.64
  4. Step 4: Simplify right side
    444.88x = 236,804.27
  5. Step 5: Solve for x
    x = 236,804.27/444.88
  6. Step 6: Final answer
    x = 532.29

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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.