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Finding the Fourth Proportional to 772.94, 1,160.02 and 286.14

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Solution

The fourth proportional to 772.94, 1,160.02 and 286.14 is: 429.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.94 : 1,160.02 = 286.14 : x
  2. Step 2: Convert to fraction form
    772.94/1,160.02 = 286.14/x
  3. Step 3: Cross multiply
    772.94x = 1,160.02 × 286.14
  4. Step 4: Simplify right side
    772.94x = 331,928.12
  5. Step 5: Solve for x
    x = 331,928.12/772.94
  6. Step 6: Final answer
    x = 429.44

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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.