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Finding the Fourth Proportional to 522.03, 781.55 and 485.54

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Solution

The fourth proportional to 522.03, 781.55 and 485.54 is: 726.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    522.03 : 781.55 = 485.54 : x
  2. Step 2: Convert to fraction form
    522.03/781.55 = 485.54/x
  3. Step 3: Cross multiply
    522.03x = 781.55 × 485.54
  4. Step 4: Simplify right side
    522.03x = 379,467.45
  5. Step 5: Solve for x
    x = 379,467.45/522.03
  6. Step 6: Final answer
    x = 726.91

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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.