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Finding the Fourth Proportional to 660,998.88, 991,563.93 and 211,606.83

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Solution

The fourth proportional to 660,998.88, 991,563.93 and 211,606.83 is: 317,431.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,998.88 : 991,563.93 = 211,606.83 : x
  2. Step 2: Convert to fraction form
    660,998.88/991,563.93 = 211,606.83/x
  3. Step 3: Cross multiply
    660,998.88x = 991,563.93 × 211,606.83
  4. Step 4: Simplify right side
    660,998.88x = 209,821,699,969.64
  5. Step 5: Solve for x
    x = 209,821,699,969.64/660,998.88
  6. Step 6: Final answer
    x = 317,431.25

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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.