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Finding the Fourth Proportional to 3,156.56, 4,356.06 and 1,811.80

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Solution

The fourth proportional to 3,156.56, 4,356.06 and 1,811.80 is: 2,500.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,156.56 : 4,356.06 = 1,811.80 : x
  2. Step 2: Convert to fraction form
    3,156.56/4,356.06 = 1,811.80/x
  3. Step 3: Cross multiply
    3,156.56x = 4,356.06 × 1,811.80
  4. Step 4: Simplify right side
    3,156.56x = 7,892,309.51
  5. Step 5: Solve for x
    x = 7,892,309.51/3,156.56
  6. Step 6: Final answer
    x = 2,500.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.