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Finding the Fourth Proportional to 572.63, 789.41 and 407.22

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Solution

The fourth proportional to 572.63, 789.41 and 407.22 is: 561.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.63 : 789.41 = 407.22 : x
  2. Step 2: Convert to fraction form
    572.63/789.41 = 407.22/x
  3. Step 3: Cross multiply
    572.63x = 789.41 × 407.22
  4. Step 4: Simplify right side
    572.63x = 321,464.56
  5. Step 5: Solve for x
    x = 321,464.56/572.63
  6. Step 6: Final answer
    x = 561.39

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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.