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Finding the Fourth Proportional to 346.21, 515.39 and 344.38

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Solution

The fourth proportional to 346.21, 515.39 and 344.38 is: 512.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    346.21 : 515.39 = 344.38 : x
  2. Step 2: Convert to fraction form
    346.21/515.39 = 344.38/x
  3. Step 3: Cross multiply
    346.21x = 515.39 × 344.38
  4. Step 4: Simplify right side
    346.21x = 177,490.01
  5. Step 5: Solve for x
    x = 177,490.01/346.21
  6. Step 6: Final answer
    x = 512.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.