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Finding the Fourth Proportional to 474.82, 655.00 and 386.39

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Solution

The fourth proportional to 474.82, 655.00 and 386.39 is: 533.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.82 : 655.00 = 386.39 : x
  2. Step 2: Convert to fraction form
    474.82/655.00 = 386.39/x
  3. Step 3: Cross multiply
    474.82x = 655.00 × 386.39
  4. Step 4: Simplify right side
    474.82x = 253,086.12
  5. Step 5: Solve for x
    x = 253,086.12/474.82
  6. Step 6: Final answer
    x = 533.02

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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.