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Finding the Fourth Proportional to 578.78, 868.51 and 348.11

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Solution

The fourth proportional to 578.78, 868.51 and 348.11 is: 522.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.78 : 868.51 = 348.11 : x
  2. Step 2: Convert to fraction form
    578.78/868.51 = 348.11/x
  3. Step 3: Cross multiply
    578.78x = 868.51 × 348.11
  4. Step 4: Simplify right side
    578.78x = 302,339.62
  5. Step 5: Solve for x
    x = 302,339.62/578.78
  6. Step 6: Final answer
    x = 522.37

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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.