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Finding the Fourth Proportional to 2,690.34, 3,712.68 and 1,694.58

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Solution

The fourth proportional to 2,690.34, 3,712.68 and 1,694.58 is: 2,338.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,690.34 : 3,712.68 = 1,694.58 : x
  2. Step 2: Convert to fraction form
    2,690.34/3,712.68 = 1,694.58/x
  3. Step 3: Cross multiply
    2,690.34x = 3,712.68 × 1,694.58
  4. Step 4: Simplify right side
    2,690.34x = 6,291,433.27
  5. Step 5: Solve for x
    x = 6,291,433.27/2,690.34
  6. Step 6: Final answer
    x = 2,338.53

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1.5x scale

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.