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Finding the Fourth Proportional to 386.95, 579.29 and 249.58

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Solution

The fourth proportional to 386.95, 579.29 and 249.58 is: 373.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.95 : 579.29 = 249.58 : x
  2. Step 2: Convert to fraction form
    386.95/579.29 = 249.58/x
  3. Step 3: Cross multiply
    386.95x = 579.29 × 249.58
  4. Step 4: Simplify right side
    386.95x = 144,579.20
  5. Step 5: Solve for x
    x = 144,579.20/386.95
  6. Step 6: Final answer
    x = 373.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.