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Finding the Fourth Proportional to 676.08, 926.90 and 663.78

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Solution

The fourth proportional to 676.08, 926.90 and 663.78 is: 910.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    676.08 : 926.90 = 663.78 : x
  2. Step 2: Convert to fraction form
    676.08/926.90 = 663.78/x
  3. Step 3: Cross multiply
    676.08x = 926.90 × 663.78
  4. Step 4: Simplify right side
    676.08x = 615,257.68
  5. Step 5: Solve for x
    x = 615,257.68/676.08
  6. Step 6: Final answer
    x = 910.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.