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Finding the Fourth Proportional to 312.06, 430.65 and 174.06

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Solution

The fourth proportional to 312.06, 430.65 and 174.06 is: 240.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    312.06 : 430.65 = 174.06 : x
  2. Step 2: Convert to fraction form
    312.06/430.65 = 174.06/x
  3. Step 3: Cross multiply
    312.06x = 430.65 × 174.06
  4. Step 4: Simplify right side
    312.06x = 74,958.94
  5. Step 5: Solve for x
    x = 74,958.94/312.06
  6. Step 6: Final answer
    x = 240.21

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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.