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Finding the Fourth Proportional to 808.76, 1,211.31 and 375

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Solution

The fourth proportional to 808.76, 1,211.31 and 375 is: 561.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    808.76 : 1,211.31 = 375 : x
  2. Step 2: Convert to fraction form
    808.76/1,211.31 = 375/x
  3. Step 3: Cross multiply
    808.76x = 1,211.31 × 375
  4. Step 4: Simplify right side
    808.76x = 454,241.25
  5. Step 5: Solve for x
    x = 454,241.25/808.76
  6. Step 6: Final answer
    x = 561.65

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.