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Finding the Fourth Proportional to 939.54, 1,296.55 and 525.54

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Solution

The fourth proportional to 939.54, 1,296.55 and 525.54 is: 725.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    939.54 : 1,296.55 = 525.54 : x
  2. Step 2: Convert to fraction form
    939.54/1,296.55 = 525.54/x
  3. Step 3: Cross multiply
    939.54x = 1,296.55 × 525.54
  4. Step 4: Simplify right side
    939.54x = 681,388.89
  5. Step 5: Solve for x
    x = 681,388.89/939.54
  6. Step 6: Final answer
    x = 725.24

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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.