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Finding the Fourth Proportional to 526.40, 789.74 and 445.82

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Solution

The fourth proportional to 526.40, 789.74 and 445.82 is: 668.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    526.40 : 789.74 = 445.82 : x
  2. Step 2: Convert to fraction form
    526.40/789.74 = 445.82/x
  3. Step 3: Cross multiply
    526.40x = 789.74 × 445.82
  4. Step 4: Simplify right side
    526.40x = 352,081.89
  5. Step 5: Solve for x
    x = 352,081.89/526.40
  6. Step 6: Final answer
    x = 668.85

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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.