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Finding the Fourth Proportional to 901.37, 1,243.87 and 528.54

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Solution

The fourth proportional to 901.37, 1,243.87 and 528.54 is: 729.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.37 : 1,243.87 = 528.54 : x
  2. Step 2: Convert to fraction form
    901.37/1,243.87 = 528.54/x
  3. Step 3: Cross multiply
    901.37x = 1,243.87 × 528.54
  4. Step 4: Simplify right side
    901.37x = 657,435.05
  5. Step 5: Solve for x
    x = 657,435.05/901.37
  6. Step 6: Final answer
    x = 729.37

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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.