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Finding the Fourth Proportional to 339.86, 509.63 and 157.14

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Solution

The fourth proportional to 339.86, 509.63 and 157.14 is: 235.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    339.86 : 509.63 = 157.14 : x
  2. Step 2: Convert to fraction form
    339.86/509.63 = 157.14/x
  3. Step 3: Cross multiply
    339.86x = 509.63 × 157.14
  4. Step 4: Simplify right side
    339.86x = 80,082.47
  5. Step 5: Solve for x
    x = 80,082.47/339.86
  6. Step 6: Final answer
    x = 235.63

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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.