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Finding the Fourth Proportional to 1,676.85, 2,313.95 and 930.78

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Solution

The fourth proportional to 1,676.85, 2,313.95 and 930.78 is: 1,284.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,676.85 : 2,313.95 = 930.78 : x
  2. Step 2: Convert to fraction form
    1,676.85/2,313.95 = 930.78/x
  3. Step 3: Cross multiply
    1,676.85x = 2,313.95 × 930.78
  4. Step 4: Simplify right side
    1,676.85x = 2,153,773.73
  5. Step 5: Solve for x
    x = 2,153,773.73/1,676.85
  6. Step 6: Final answer
    x = 1,284.42

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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.