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Finding the Fourth Proportional to 755.83, 1,042.88 and 476.08

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Solution

The fourth proportional to 755.83, 1,042.88 and 476.08 is: 656.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    755.83 : 1,042.88 = 476.08 : x
  2. Step 2: Convert to fraction form
    755.83/1,042.88 = 476.08/x
  3. Step 3: Cross multiply
    755.83x = 1,042.88 × 476.08
  4. Step 4: Simplify right side
    755.83x = 496,489.32
  5. Step 5: Solve for x
    x = 496,489.32/755.83
  6. Step 6: Final answer
    x = 656.88

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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.