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Finding the Fourth Proportional to 393.56, 587.38 and 341.90

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Solution

The fourth proportional to 393.56, 587.38 and 341.90 is: 510.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.56 : 587.38 = 341.90 : x
  2. Step 2: Convert to fraction form
    393.56/587.38 = 341.90/x
  3. Step 3: Cross multiply
    393.56x = 587.38 × 341.90
  4. Step 4: Simplify right side
    393.56x = 200,825.22
  5. Step 5: Solve for x
    x = 200,825.22/393.56
  6. Step 6: Final answer
    x = 510.28

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.