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Finding the Fourth Proportional to 1,676.70, 2,313.78 and 968.43

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Solution

The fourth proportional to 1,676.70, 2,313.78 and 968.43 is: 1,336.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.70 : 2,313.78 = 968.43 : x
  2. Step 2: Convert to fraction form
    1,676.70/2,313.78 = 968.43/x
  3. Step 3: Cross multiply
    1,676.70x = 2,313.78 × 968.43
  4. Step 4: Simplify right side
    1,676.70x = 2,240,733.86
  5. Step 5: Solve for x
    x = 2,240,733.86/1,676.70
  6. Step 6: Final answer
    x = 1,336.40

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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.