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Finding the Fourth Proportional to 393.06, 589.61 and 104.50

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Solution

The fourth proportional to 393.06, 589.61 and 104.50 is: 156.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    393.06 : 589.61 = 104.50 : x
  2. Step 2: Convert to fraction form
    393.06/589.61 = 104.50/x
  3. Step 3: Cross multiply
    393.06x = 589.61 × 104.50
  4. Step 4: Simplify right side
    393.06x = 61,614.25
  5. Step 5: Solve for x
    x = 61,614.25/393.06
  6. Step 6: Final answer
    x = 156.76

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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.