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Finding the Fourth Proportional to 4,612.54, 6,919.74 and 1,690.78

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Solution

The fourth proportional to 4,612.54, 6,919.74 and 1,690.78 is: 2,536.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,612.54 : 6,919.74 = 1,690.78 : x
  2. Step 2: Convert to fraction form
    4,612.54/6,919.74 = 1,690.78/x
  3. Step 3: Cross multiply
    4,612.54x = 6,919.74 × 1,690.78
  4. Step 4: Simplify right side
    4,612.54x = 11,699,758.00
  5. Step 5: Solve for x
    x = 11,699,758.00/4,612.54
  6. Step 6: Final answer
    x = 2,536.51

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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.