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Finding the Fourth Proportional to 939.63, 1,296.69 and 525.63

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Solution

The fourth proportional to 939.63, 1,296.69 and 525.63 is: 725.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.63 : 1,296.69 = 525.63 : x
  2. Step 2: Convert to fraction form
    939.63/1,296.69 = 525.63/x
  3. Step 3: Cross multiply
    939.63x = 1,296.69 × 525.63
  4. Step 4: Simplify right side
    939.63x = 681,579.16
  5. Step 5: Solve for x
    x = 681,579.16/939.63
  6. Step 6: Final answer
    x = 725.37

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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.