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Finding the Fourth Proportional to 660,664.73, 991,144.77 and 211,412.57

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Solution

The fourth proportional to 660,664.73, 991,144.77 and 211,412.57 is: 317,166.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,664.73 : 991,144.77 = 211,412.57 : x
  2. Step 2: Convert to fraction form
    660,664.73/991,144.77 = 211,412.57/x
  3. Step 3: Cross multiply
    660,664.73x = 991,144.77 × 211,412.57
  4. Step 4: Simplify right side
    660,664.73x = 209,540,465,545.62
  5. Step 5: Solve for x
    x = 209,540,465,545.62/660,664.73
  6. Step 6: Final answer
    x = 317,166.11

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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.