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Finding the Fourth Proportional to 340, 509.96 and 120.58

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Solution

The fourth proportional to 340, 509.96 and 120.58 is: 180.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    340 : 509.96 = 120.58 : x
  2. Step 2: Convert to fraction form
    340/509.96 = 120.58/x
  3. Step 3: Cross multiply
    340x = 509.96 × 120.58
  4. Step 4: Simplify right side
    340x = 61,490.98
  5. Step 5: Solve for x
    x = 61,490.98/340
  6. Step 6: Final answer
    x = 180.86

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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.