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Finding the Fourth Proportional to 518.00, 774.59 and 386.46

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Solution

The fourth proportional to 518.00, 774.59 and 386.46 is: 577.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.00 : 774.59 = 386.46 : x
  2. Step 2: Convert to fraction form
    518.00/774.59 = 386.46/x
  3. Step 3: Cross multiply
    518.00x = 774.59 × 386.46
  4. Step 4: Simplify right side
    518.00x = 299,346.12
  5. Step 5: Solve for x
    x = 299,346.12/518.00
  6. Step 6: Final answer
    x = 577.89

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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.