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Finding the Fourth Proportional to 339.81, 509.69 and 96.30

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Solution

The fourth proportional to 339.81, 509.69 and 96.30 is: 144.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.81 : 509.69 = 96.30 : x
  2. Step 2: Convert to fraction form
    339.81/509.69 = 96.30/x
  3. Step 3: Cross multiply
    339.81x = 509.69 × 96.30
  4. Step 4: Simplify right side
    339.81x = 49,084.94
  5. Step 5: Solve for x
    x = 49,084.94/339.81
  6. Step 6: Final answer
    x = 144.45

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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.