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Finding the Fourth Proportional to 455,055.81, 682,030.35 and 321,974.43

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Solution

The fourth proportional to 455,055.81, 682,030.35 and 321,974.43 is: 482,570.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,055.81 : 682,030.35 = 321,974.43 : x
  2. Step 2: Convert to fraction form
    455,055.81/682,030.35 = 321,974.43/x
  3. Step 3: Cross multiply
    455,055.81x = 682,030.35 × 321,974.43
  4. Step 4: Simplify right side
    455,055.81x = 219,596,333,183.95
  5. Step 5: Solve for x
    x = 219,596,333,183.95/455,055.81
  6. Step 6: Final answer
    x = 482,570.11

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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.