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Finding the Fourth Proportional to 806.01, 1,209.02 and 286.02

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Solution

The fourth proportional to 806.01, 1,209.02 and 286.02 is: 429.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    806.01 : 1,209.02 = 286.02 : x
  2. Step 2: Convert to fraction form
    806.01/1,209.02 = 286.02/x
  3. Step 3: Cross multiply
    806.01x = 1,209.02 × 286.02
  4. Step 4: Simplify right side
    806.01x = 345,804.62
  5. Step 5: Solve for x
    x = 345,804.62/806.01
  6. Step 6: Final answer
    x = 429.03

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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.