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Finding the Fourth Proportional to 572.70, 789.73 and 490.08

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Solution

The fourth proportional to 572.70, 789.73 and 490.08 is: 675.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.70 : 789.73 = 490.08 : x
  2. Step 2: Convert to fraction form
    572.70/789.73 = 490.08/x
  3. Step 3: Cross multiply
    572.70x = 789.73 × 490.08
  4. Step 4: Simplify right side
    572.70x = 387,030.88
  5. Step 5: Solve for x
    x = 387,030.88/572.70
  6. Step 6: Final answer
    x = 675.80

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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.