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Finding the Fourth Proportional to 680.83, 939.03 and 431.89

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Solution

The fourth proportional to 680.83, 939.03 and 431.89 is: 595.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    680.83 : 939.03 = 431.89 : x
  2. Step 2: Convert to fraction form
    680.83/939.03 = 431.89/x
  3. Step 3: Cross multiply
    680.83x = 939.03 × 431.89
  4. Step 4: Simplify right side
    680.83x = 405,557.67
  5. Step 5: Solve for x
    x = 405,557.67/680.83
  6. Step 6: Final answer
    x = 595.68

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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.