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Finding the Fourth Proportional to 718.69, 996.83 and 689.53

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Solution

The fourth proportional to 718.69, 996.83 and 689.53 is: 956.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    718.69 : 996.83 = 689.53 : x
  2. Step 2: Convert to fraction form
    718.69/996.83 = 689.53/x
  3. Step 3: Cross multiply
    718.69x = 996.83 × 689.53
  4. Step 4: Simplify right side
    718.69x = 687,344.19
  5. Step 5: Solve for x
    x = 687,344.19/718.69
  6. Step 6: Final answer
    x = 956.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.