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Finding the Fourth Proportional to 526.30, 789.44 and 141.55

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Solution

The fourth proportional to 526.30, 789.44 and 141.55 is: 212.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.30 : 789.44 = 141.55 : x
  2. Step 2: Convert to fraction form
    526.30/789.44 = 141.55/x
  3. Step 3: Cross multiply
    526.30x = 789.44 × 141.55
  4. Step 4: Simplify right side
    526.30x = 111,745.23
  5. Step 5: Solve for x
    x = 111,745.23/526.30
  6. Step 6: Final answer
    x = 212.32

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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.