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Finding the Fourth Proportional to 755.44, 1,042.56 and 445.12

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Solution

The fourth proportional to 755.44, 1,042.56 and 445.12 is: 614.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.44 : 1,042.56 = 445.12 : x
  2. Step 2: Convert to fraction form
    755.44/1,042.56 = 445.12/x
  3. Step 3: Cross multiply
    755.44x = 1,042.56 × 445.12
  4. Step 4: Simplify right side
    755.44x = 464,064.31
  5. Step 5: Solve for x
    x = 464,064.31/755.44
  6. Step 6: Final answer
    x = 614.30

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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.