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Finding the Fourth Proportional to 755.16, 1,042.12 and 440.64

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Solution

The fourth proportional to 755.16, 1,042.12 and 440.64 is: 608.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.16 : 1,042.12 = 440.64 : x
  2. Step 2: Convert to fraction form
    755.16/1,042.12 = 440.64/x
  3. Step 3: Cross multiply
    755.16x = 1,042.12 × 440.64
  4. Step 4: Simplify right side
    755.16x = 459,200.31
  5. Step 5: Solve for x
    x = 459,200.31/755.16
  6. Step 6: Final answer
    x = 608.09

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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.