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Finding the Fourth Proportional to 309.40, 425.98 and 273.43

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Solution

The fourth proportional to 309.40, 425.98 and 273.43 is: 376.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.40 : 425.98 = 273.43 : x
  2. Step 2: Convert to fraction form
    309.40/425.98 = 273.43/x
  3. Step 3: Cross multiply
    309.40x = 425.98 × 273.43
  4. Step 4: Simplify right side
    309.40x = 116,475.71
  5. Step 5: Solve for x
    x = 116,475.71/309.40
  6. Step 6: Final answer
    x = 376.46

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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.