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Finding the Fourth Proportional to 309.37, 426.06 and 286.28

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Solution

The fourth proportional to 309.37, 426.06 and 286.28 is: 394.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.37 : 426.06 = 286.28 : x
  2. Step 2: Convert to fraction form
    309.37/426.06 = 286.28/x
  3. Step 3: Cross multiply
    309.37x = 426.06 × 286.28
  4. Step 4: Simplify right side
    309.37x = 121,973.52
  5. Step 5: Solve for x
    x = 121,973.52/309.37
  6. Step 6: Final answer
    x = 394.27

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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.