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Finding the Fourth Proportional to 578.45, 866.45 and 404.71

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Solution

The fourth proportional to 578.45, 866.45 and 404.71 is: 606.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.45 : 866.45 = 404.71 : x
  2. Step 2: Convert to fraction form
    578.45/866.45 = 404.71/x
  3. Step 3: Cross multiply
    578.45x = 866.45 × 404.71
  4. Step 4: Simplify right side
    578.45x = 350,659.83
  5. Step 5: Solve for x
    x = 350,659.83/578.45
  6. Step 6: Final answer
    x = 606.20

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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.