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Finding the Fourth Proportional to 683.98, 943.88 and 389.24

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Solution

The fourth proportional to 683.98, 943.88 and 389.24 is: 537.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.98 : 943.88 = 389.24 : x
  2. Step 2: Convert to fraction form
    683.98/943.88 = 389.24/x
  3. Step 3: Cross multiply
    683.98x = 943.88 × 389.24
  4. Step 4: Simplify right side
    683.98x = 367,392.73
  5. Step 5: Solve for x
    x = 367,392.73/683.98
  6. Step 6: Final answer
    x = 537.14

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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.