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Finding the Fourth Proportional to 573.48, 789.56 and 499.80

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Solution

The fourth proportional to 573.48, 789.56 and 499.80 is: 688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    573.48 : 789.56 = 499.80 : x
  2. Step 2: Convert to fraction form
    573.48/789.56 = 499.80/x
  3. Step 3: Cross multiply
    573.48x = 789.56 × 499.80
  4. Step 4: Simplify right side
    573.48x = 394,622.09
  5. Step 5: Solve for x
    x = 394,622.09/573.48
  6. Step 6: Final answer
    x = 688.12

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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.