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Finding the Fourth Proportional to 369.09, 509.09 and 286.00

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Solution

The fourth proportional to 369.09, 509.09 and 286.00 is: 394.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.09 : 509.09 = 286.00 : x
  2. Step 2: Convert to fraction form
    369.09/509.09 = 286.00/x
  3. Step 3: Cross multiply
    369.09x = 509.09 × 286.00
  4. Step 4: Simplify right side
    369.09x = 145,597.04
  5. Step 5: Solve for x
    x = 145,597.04/369.09
  6. Step 6: Final answer
    x = 394.48

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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.