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Finding the Fourth Proportional to 309.06, 463.20 and 126.30

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Solution

The fourth proportional to 309.06, 463.20 and 126.30 is: 189.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    309.06 : 463.20 = 126.30 : x
  2. Step 2: Convert to fraction form
    309.06/463.20 = 126.30/x
  3. Step 3: Cross multiply
    309.06x = 463.20 × 126.30
  4. Step 4: Simplify right side
    309.06x = 58,502.16
  5. Step 5: Solve for x
    x = 58,502.16/309.06
  6. Step 6: Final answer
    x = 189.29

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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.