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Finding the Fourth Proportional to 941.70, 1,299.64 and 522.16

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Solution

The fourth proportional to 941.70, 1,299.64 and 522.16 is: 720.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.70 : 1,299.64 = 522.16 : x
  2. Step 2: Convert to fraction form
    941.70/1,299.64 = 522.16/x
  3. Step 3: Cross multiply
    941.70x = 1,299.64 × 522.16
  4. Step 4: Simplify right side
    941.70x = 678,620.02
  5. Step 5: Solve for x
    x = 678,620.02/941.70
  6. Step 6: Final answer
    x = 720.63

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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.