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Finding the Fourth Proportional to 719.69, 993.57 and 679.59

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Solution

The fourth proportional to 719.69, 993.57 and 679.59 is: 938.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.69 : 993.57 = 679.59 : x
  2. Step 2: Convert to fraction form
    719.69/993.57 = 679.59/x
  3. Step 3: Cross multiply
    719.69x = 993.57 × 679.59
  4. Step 4: Simplify right side
    719.69x = 675,217.69
  5. Step 5: Solve for x
    x = 675,217.69/719.69
  6. Step 6: Final answer
    x = 938.21

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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.