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Finding the Fourth Proportional to 773.18, 1,159.63 and 286.11

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Solution

The fourth proportional to 773.18, 1,159.63 and 286.11 is: 429.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    773.18 : 1,159.63 = 286.11 : x
  2. Step 2: Convert to fraction form
    773.18/1,159.63 = 286.11/x
  3. Step 3: Cross multiply
    773.18x = 1,159.63 × 286.11
  4. Step 4: Simplify right side
    773.18x = 331,781.02
  5. Step 5: Solve for x
    x = 331,781.02/773.18
  6. Step 6: Final answer
    x = 429.11

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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.