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Finding the Fourth Proportional to 559.08, 771.38 and 381.72

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Solution

The fourth proportional to 559.08, 771.38 and 381.72 is: 526.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.08 : 771.38 = 381.72 : x
  2. Step 2: Convert to fraction form
    559.08/771.38 = 381.72/x
  3. Step 3: Cross multiply
    559.08x = 771.38 × 381.72
  4. Step 4: Simplify right side
    559.08x = 294,451.17
  5. Step 5: Solve for x
    x = 294,451.17/559.08
  6. Step 6: Final answer
    x = 526.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.