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Finding the Fourth Proportional to 941.82, 1,299.72 and 522.20

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Solution

The fourth proportional to 941.82, 1,299.72 and 522.20 is: 720.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    941.82 : 1,299.72 = 522.20 : x
  2. Step 2: Convert to fraction form
    941.82/1,299.72 = 522.20/x
  3. Step 3: Cross multiply
    941.82x = 1,299.72 × 522.20
  4. Step 4: Simplify right side
    941.82x = 678,713.78
  5. Step 5: Solve for x
    x = 678,713.78/941.82
  6. Step 6: Final answer
    x = 720.64

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Double scale
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1.5x scale

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.