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Finding the Fourth Proportional to 3,505.68, 5,256.90 and 1,313.82

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Solution

The fourth proportional to 3,505.68, 5,256.90 and 1,313.82 is: 1,970.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,505.68 : 5,256.90 = 1,313.82 : x
  2. Step 2: Convert to fraction form
    3,505.68/5,256.90 = 1,313.82/x
  3. Step 3: Cross multiply
    3,505.68x = 5,256.90 × 1,313.82
  4. Step 4: Simplify right side
    3,505.68x = 6,906,620.36
  5. Step 5: Solve for x
    x = 6,906,620.36/3,505.68
  6. Step 6: Final answer
    x = 1,970.12

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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.