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Finding the Fourth Proportional to 2,808.58, 3,876.06 and 1,690.06

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Solution

The fourth proportional to 2,808.58, 3,876.06 and 1,690.06 is: 2,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,808.58 : 3,876.06 = 1,690.06 : x
  2. Step 2: Convert to fraction form
    2,808.58/3,876.06 = 1,690.06/x
  3. Step 3: Cross multiply
    2,808.58x = 3,876.06 × 1,690.06
  4. Step 4: Simplify right side
    2,808.58x = 6,550,773.96
  5. Step 5: Solve for x
    x = 6,550,773.96/2,808.58
  6. Step 6: Final answer
    x = 2,332.41

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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.