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Finding the Fourth Proportional to 683.20, 943.28 and 431.51

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Solution

The fourth proportional to 683.20, 943.28 and 431.51 is: 595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    683.20 : 943.28 = 431.51 : x
  2. Step 2: Convert to fraction form
    683.20/943.28 = 431.51/x
  3. Step 3: Cross multiply
    683.20x = 943.28 × 431.51
  4. Step 4: Simplify right side
    683.20x = 407,034.75
  5. Step 5: Solve for x
    x = 407,034.75/683.20
  6. Step 6: Final answer
    x = 595.78

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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.