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Finding the Fourth Proportional to 578.28, 866.30 and 434.60

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Solution

The fourth proportional to 578.28, 866.30 and 434.60 is: 651.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.28 : 866.30 = 434.60 : x
  2. Step 2: Convert to fraction form
    578.28/866.30 = 434.60/x
  3. Step 3: Cross multiply
    578.28x = 866.30 × 434.60
  4. Step 4: Simplify right side
    578.28x = 376,493.98
  5. Step 5: Solve for x
    x = 376,493.98/578.28
  6. Step 6: Final answer
    x = 651.06

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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.