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Finding the Fourth Proportional to 660,664.98, 991,145.14 and 211,412.82

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Solution

The fourth proportional to 660,664.98, 991,145.14 and 211,412.82 is: 317,166.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,664.98 : 991,145.14 = 211,412.82 : x
  2. Step 2: Convert to fraction form
    660,664.98/991,145.14 = 211,412.82/x
  3. Step 3: Cross multiply
    660,664.98x = 991,145.14 × 211,412.82
  4. Step 4: Simplify right side
    660,664.98x = 209,540,789,076.70
  5. Step 5: Solve for x
    x = 209,540,789,076.70/660,664.98
  6. Step 6: Final answer
    x = 317,166.48

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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.