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Finding the Fourth Proportional to 941.72, 1,299.57 and 522.09

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Solution

The fourth proportional to 941.72, 1,299.57 and 522.09 is: 720.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.72 : 1,299.57 = 522.09 : x
  2. Step 2: Convert to fraction form
    941.72/1,299.57 = 522.09/x
  3. Step 3: Cross multiply
    941.72x = 1,299.57 × 522.09
  4. Step 4: Simplify right side
    941.72x = 678,492.50
  5. Step 5: Solve for x
    x = 678,492.50/941.72
  6. Step 6: Final answer
    x = 720.49

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Double scale
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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.