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Finding the Fourth Proportional to 941.88, 1,299.72 and 522.21

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Solution

The fourth proportional to 941.88, 1,299.72 and 522.21 is: 720.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.88 : 1,299.72 = 522.21 : x
  2. Step 2: Convert to fraction form
    941.88/1,299.72 = 522.21/x
  3. Step 3: Cross multiply
    941.88x = 1,299.72 × 522.21
  4. Step 4: Simplify right side
    941.88x = 678,726.78
  5. Step 5: Solve for x
    x = 678,726.78/941.88
  6. Step 6: Final answer
    x = 720.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.