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Finding the Fourth Proportional to 1,811.77, 2,500.05 and 1,025.80

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Solution

The fourth proportional to 1,811.77, 2,500.05 and 1,025.80 is: 1,415.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,811.77 : 2,500.05 = 1,025.80 : x
  2. Step 2: Convert to fraction form
    1,811.77/2,500.05 = 1,025.80/x
  3. Step 3: Cross multiply
    1,811.77x = 2,500.05 × 1,025.80
  4. Step 4: Simplify right side
    1,811.77x = 2,564,551.29
  5. Step 5: Solve for x
    x = 2,564,551.29/1,811.77
  6. Step 6: Final answer
    x = 1,415.49

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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.