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Finding the Fourth Proportional to 790.74, 1,184.60 and 481.68

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Solution

The fourth proportional to 790.74, 1,184.60 and 481.68 is: 721.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    790.74 : 1,184.60 = 481.68 : x
  2. Step 2: Convert to fraction form
    790.74/1,184.60 = 481.68/x
  3. Step 3: Cross multiply
    790.74x = 1,184.60 × 481.68
  4. Step 4: Simplify right side
    790.74x = 570,595.72
  5. Step 5: Solve for x
    x = 570,595.72/790.74
  6. Step 6: Final answer
    x = 721.60

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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.