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Finding the Fourth Proportional to 455,187.57, 682,238.39 and 211,699.95

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Solution

The fourth proportional to 455,187.57, 682,238.39 and 211,699.95 is: 317,297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,187.57 : 682,238.39 = 211,699.95 : x
  2. Step 2: Convert to fraction form
    455,187.57/682,238.39 = 211,699.95/x
  3. Step 3: Cross multiply
    455,187.57x = 682,238.39 × 211,699.95
  4. Step 4: Simplify right side
    455,187.57x = 144,429,831,992.58
  5. Step 5: Solve for x
    x = 144,429,831,992.58/455,187.57
  6. Step 6: Final answer
    x = 317,297.40

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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.