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Finding the Fourth Proportional to 346.87, 519.81 and 286.72

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Solution

The fourth proportional to 346.87, 519.81 and 286.72 is: 429.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.87 : 519.81 = 286.72 : x
  2. Step 2: Convert to fraction form
    346.87/519.81 = 286.72/x
  3. Step 3: Cross multiply
    346.87x = 519.81 × 286.72
  4. Step 4: Simplify right side
    346.87x = 149,039.92
  5. Step 5: Solve for x
    x = 149,039.92/346.87
  6. Step 6: Final answer
    x = 429.67

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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.