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Finding the Fourth Proportional to 772.36, 1,065.54 and 461.32

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Solution

The fourth proportional to 772.36, 1,065.54 and 461.32 is: 636.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.36 : 1,065.54 = 461.32 : x
  2. Step 2: Convert to fraction form
    772.36/1,065.54 = 461.32/x
  3. Step 3: Cross multiply
    772.36x = 1,065.54 × 461.32
  4. Step 4: Simplify right side
    772.36x = 491,554.91
  5. Step 5: Solve for x
    x = 491,554.91/772.36
  6. Step 6: Final answer
    x = 636.43

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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.