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Finding the Fourth Proportional to 790.56, 1,185.12 and 443.88

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Solution

The fourth proportional to 790.56, 1,185.12 and 443.88 is: 665.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.56 : 1,185.12 = 443.88 : x
  2. Step 2: Convert to fraction form
    790.56/1,185.12 = 443.88/x
  3. Step 3: Cross multiply
    790.56x = 1,185.12 × 443.88
  4. Step 4: Simplify right side
    790.56x = 526,051.07
  5. Step 5: Solve for x
    x = 526,051.07/790.56
  6. Step 6: Final answer
    x = 665.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.