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Finding the Fourth Proportional to 339.69, 509.50 and 154.77

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Solution

The fourth proportional to 339.69, 509.50 and 154.77 is: 232.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.69 : 509.50 = 154.77 : x
  2. Step 2: Convert to fraction form
    339.69/509.50 = 154.77/x
  3. Step 3: Cross multiply
    339.69x = 509.50 × 154.77
  4. Step 4: Simplify right side
    339.69x = 78,855.32
  5. Step 5: Solve for x
    x = 78,855.32/339.69
  6. Step 6: Final answer
    x = 232.14

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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.