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Finding the Fourth Proportional to 309.04, 426.63 and 192.64

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Solution

The fourth proportional to 309.04, 426.63 and 192.64 is: 265.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.04 : 426.63 = 192.64 : x
  2. Step 2: Convert to fraction form
    309.04/426.63 = 192.64/x
  3. Step 3: Cross multiply
    309.04x = 426.63 × 192.64
  4. Step 4: Simplify right side
    309.04x = 82,186.00
  5. Step 5: Solve for x
    x = 82,186.00/309.04
  6. Step 6: Final answer
    x = 265.94

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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.