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Finding the Fourth Proportional to 369.87, 509.91 and 251.67

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Solution

The fourth proportional to 369.87, 509.91 and 251.67 is: 346.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.87 : 509.91 = 251.67 : x
  2. Step 2: Convert to fraction form
    369.87/509.91 = 251.67/x
  3. Step 3: Cross multiply
    369.87x = 509.91 × 251.67
  4. Step 4: Simplify right side
    369.87x = 128,327.13
  5. Step 5: Solve for x
    x = 128,327.13/369.87
  6. Step 6: Final answer
    x = 346.95

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.