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Finding the Fourth Proportional to 3,810.92, 5,716.54 and 1,345.76

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Solution

The fourth proportional to 3,810.92, 5,716.54 and 1,345.76 is: 2,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,810.92 : 5,716.54 = 1,345.76 : x
  2. Step 2: Convert to fraction form
    3,810.92/5,716.54 = 1,345.76/x
  3. Step 3: Cross multiply
    3,810.92x = 5,716.54 × 1,345.76
  4. Step 4: Simplify right side
    3,810.92x = 7,693,090.87
  5. Step 5: Solve for x
    x = 7,693,090.87/3,810.92
  6. Step 6: Final answer
    x = 2,018.70

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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.