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Finding the Fourth Proportional to 901.44, 1,352.08 and 381.20

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Solution

The fourth proportional to 901.44, 1,352.08 and 381.20 is: 571.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    901.44 : 1,352.08 = 381.20 : x
  2. Step 2: Convert to fraction form
    901.44/1,352.08 = 381.20/x
  3. Step 3: Cross multiply
    901.44x = 1,352.08 × 381.20
  4. Step 4: Simplify right side
    901.44x = 515,412.90
  5. Step 5: Solve for x
    x = 515,412.90/901.44
  6. Step 6: Final answer
    x = 571.77

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.