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Finding the Fourth Proportional to 755.58, 1,042.62 and 445.08

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Solution

The fourth proportional to 755.58, 1,042.62 and 445.08 is: 614.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.58 : 1,042.62 = 445.08 : x
  2. Step 2: Convert to fraction form
    755.58/1,042.62 = 445.08/x
  3. Step 3: Cross multiply
    755.58x = 1,042.62 × 445.08
  4. Step 4: Simplify right side
    755.58x = 464,049.31
  5. Step 5: Solve for x
    x = 464,049.31/755.58
  6. Step 6: Final answer
    x = 614.16

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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.