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Finding the Fourth Proportional to 683.50, 944.47 and 486.67

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Solution

The fourth proportional to 683.50, 944.47 and 486.67 is: 672.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.50 : 944.47 = 486.67 : x
  2. Step 2: Convert to fraction form
    683.50/944.47 = 486.67/x
  3. Step 3: Cross multiply
    683.50x = 944.47 × 486.67
  4. Step 4: Simplify right side
    683.50x = 459,645.18
  5. Step 5: Solve for x
    x = 459,645.18/683.50
  6. Step 6: Final answer
    x = 672.49

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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.