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Finding the Fourth Proportional to 525.40, 789.12 and 448.48

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Solution

The fourth proportional to 525.40, 789.12 and 448.48 is: 673.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.40 : 789.12 = 448.48 : x
  2. Step 2: Convert to fraction form
    525.40/789.12 = 448.48/x
  3. Step 3: Cross multiply
    525.40x = 789.12 × 448.48
  4. Step 4: Simplify right side
    525.40x = 353,904.54
  5. Step 5: Solve for x
    x = 353,904.54/525.40
  6. Step 6: Final answer
    x = 673.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.