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Finding the Fourth Proportional to 386.45, 533.55 and 344.93

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Solution

The fourth proportional to 386.45, 533.55 and 344.93 is: 476.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.45 : 533.55 = 344.93 : x
  2. Step 2: Convert to fraction form
    386.45/533.55 = 344.93/x
  3. Step 3: Cross multiply
    386.45x = 533.55 × 344.93
  4. Step 4: Simplify right side
    386.45x = 184,035.68
  5. Step 5: Solve for x
    x = 184,035.68/386.45
  6. Step 6: Final answer
    x = 476.23

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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.