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Finding the Fourth Proportional to 1,690.70, 2,332.64 and 1,336.68

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Solution

The fourth proportional to 1,690.70, 2,332.64 and 1,336.68 is: 1,844.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,690.70 : 2,332.64 = 1,336.68 : x
  2. Step 2: Convert to fraction form
    1,690.70/2,332.64 = 1,336.68/x
  3. Step 3: Cross multiply
    1,690.70x = 2,332.64 × 1,336.68
  4. Step 4: Simplify right side
    1,690.70x = 3,117,996.58
  5. Step 5: Solve for x
    x = 3,117,996.58/1,690.70
  6. Step 6: Final answer
    x = 1,844.21

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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.