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Finding the Fourth Proportional to 525.20, 786.70 and 443.75

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Solution

The fourth proportional to 525.20, 786.70 and 443.75 is: 664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    525.20 : 786.70 = 443.75 : x
  2. Step 2: Convert to fraction form
    525.20/786.70 = 443.75/x
  3. Step 3: Cross multiply
    525.20x = 786.70 × 443.75
  4. Step 4: Simplify right side
    525.20x = 349,099.17
  5. Step 5: Solve for x
    x = 349,099.17/525.20
  6. Step 6: Final answer
    x = 664.70

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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.