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Finding the Fourth Proportional to 1,778.50, 2,656.96 and 1,486.90

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Solution

The fourth proportional to 1,778.50, 2,656.96 and 1,486.90 is: 2,221.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,778.50 : 2,656.96 = 1,486.90 : x
  2. Step 2: Convert to fraction form
    1,778.50/2,656.96 = 1,486.90/x
  3. Step 3: Cross multiply
    1,778.50x = 2,656.96 × 1,486.90
  4. Step 4: Simplify right side
    1,778.50x = 3,950,626.39
  5. Step 5: Solve for x
    x = 3,950,626.39/1,778.50
  6. Step 6: Final answer
    x = 2,221.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.