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Finding the Fourth Proportional to 716.73, 989.75 and 677.89

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Solution

The fourth proportional to 716.73, 989.75 and 677.89 is: 936.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    716.73 : 989.75 = 677.89 : x
  2. Step 2: Convert to fraction form
    716.73/989.75 = 677.89/x
  3. Step 3: Cross multiply
    716.73x = 989.75 × 677.89
  4. Step 4: Simplify right side
    716.73x = 670,945.91
  5. Step 5: Solve for x
    x = 670,945.91/716.73
  6. Step 6: Final answer
    x = 936.13

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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.