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Finding the Fourth Proportional to 374.50, 517.89 and 357.31

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Solution

The fourth proportional to 374.50, 517.89 and 357.31 is: 494.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.50 : 517.89 = 357.31 : x
  2. Step 2: Convert to fraction form
    374.50/517.89 = 357.31/x
  3. Step 3: Cross multiply
    374.50x = 517.89 × 357.31
  4. Step 4: Simplify right side
    374.50x = 185,047.28
  5. Step 5: Solve for x
    x = 185,047.28/374.50
  6. Step 6: Final answer
    x = 494.12

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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.