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Finding the Fourth Proportional to 410.50, 566.22 and 393.40

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Solution

The fourth proportional to 410.50, 566.22 and 393.40 is: 542.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    410.50 : 566.22 = 393.40 : x
  2. Step 2: Convert to fraction form
    410.50/566.22 = 393.40/x
  3. Step 3: Cross multiply
    410.50x = 566.22 × 393.40
  4. Step 4: Simplify right side
    410.50x = 222,750.95
  5. Step 5: Solve for x
    x = 222,750.95/410.50
  6. Step 6: Final answer
    x = 542.63

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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.