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Finding the Fourth Proportional to 578.64, 866.52 and 415.80

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Solution

The fourth proportional to 578.64, 866.52 and 415.80 is: 622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.64 : 866.52 = 415.80 : x
  2. Step 2: Convert to fraction form
    578.64/866.52 = 415.80/x
  3. Step 3: Cross multiply
    578.64x = 866.52 × 415.80
  4. Step 4: Simplify right side
    578.64x = 360,299.02
  5. Step 5: Solve for x
    x = 360,299.02/578.64
  6. Step 6: Final answer
    x = 622.67

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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.