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Finding the Fourth Proportional to 529.44, 789.75 and 443.32

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Solution

The fourth proportional to 529.44, 789.75 and 443.32 is: 661.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.44 : 789.75 = 443.32 : x
  2. Step 2: Convert to fraction form
    529.44/789.75 = 443.32/x
  3. Step 3: Cross multiply
    529.44x = 789.75 × 443.32
  4. Step 4: Simplify right side
    529.44x = 350,114.44
  5. Step 5: Solve for x
    x = 350,114.44/529.44
  6. Step 6: Final answer
    x = 661.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.