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Finding the Fourth Proportional to 1,343.60, 2,015.48 and 356.43

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Solution

The fourth proportional to 1,343.60, 2,015.48 and 356.43 is: 534.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,343.60 : 2,015.48 = 356.43 : x
  2. Step 2: Convert to fraction form
    1,343.60/2,015.48 = 356.43/x
  3. Step 3: Cross multiply
    1,343.60x = 2,015.48 × 356.43
  4. Step 4: Simplify right side
    1,343.60x = 718,375.75
  5. Step 5: Solve for x
    x = 718,375.75/1,343.60
  6. Step 6: Final answer
    x = 534.67

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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.