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Finding the Fourth Proportional to 448.88, 618.71 and 386.37

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Solution

The fourth proportional to 448.88, 618.71 and 386.37 is: 532.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.88 : 618.71 = 386.37 : x
  2. Step 2: Convert to fraction form
    448.88/618.71 = 386.37/x
  3. Step 3: Cross multiply
    448.88x = 618.71 × 386.37
  4. Step 4: Simplify right side
    448.88x = 239,049.05
  5. Step 5: Solve for x
    x = 239,049.05/448.88
  6. Step 6: Final answer
    x = 532.55

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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.