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Finding the Fourth Proportional to 684.20, 944.20 and 373.70

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Solution

The fourth proportional to 684.20, 944.20 and 373.70 is: 515.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.20 : 944.20 = 373.70 : x
  2. Step 2: Convert to fraction form
    684.20/944.20 = 373.70/x
  3. Step 3: Cross multiply
    684.20x = 944.20 × 373.70
  4. Step 4: Simplify right side
    684.20x = 352,847.54
  5. Step 5: Solve for x
    x = 352,847.54/684.20
  6. Step 6: Final answer
    x = 515.71

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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.