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Finding the Fourth Proportional to 374.86, 517.37 and 286.20

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Solution

The fourth proportional to 374.86, 517.37 and 286.20 is: 395.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.86 : 517.37 = 286.20 : x
  2. Step 2: Convert to fraction form
    374.86/517.37 = 286.20/x
  3. Step 3: Cross multiply
    374.86x = 517.37 × 286.20
  4. Step 4: Simplify right side
    374.86x = 148,069.42
  5. Step 5: Solve for x
    x = 148,069.42/374.86
  6. Step 6: Final answer
    x = 395.00

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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.