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Finding the Fourth Proportional to 688.73, 944.21 and 676.42

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Solution

The fourth proportional to 688.73, 944.21 and 676.42 is: 927.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    688.73 : 944.21 = 676.42 : x
  2. Step 2: Convert to fraction form
    688.73/944.21 = 676.42/x
  3. Step 3: Cross multiply
    688.73x = 944.21 × 676.42
  4. Step 4: Simplify right side
    688.73x = 638,681.86
  5. Step 5: Solve for x
    x = 638,681.86/688.73
  6. Step 6: Final answer
    x = 927.34

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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.