Home / 1,991,900.72-2,749,035.84-1,217,985.14

Finding the Fourth Proportional to 1,991,900.72, 2,749,035.84 and 1,217,985.14

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Solution

The fourth proportional to 1,991,900.72, 2,749,035.84 and 1,217,985.14 is: 1,680,949.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,991,900.72 : 2,749,035.84 = 1,217,985.14 : x
  2. Step 2: Convert to fraction form
    1,991,900.72/2,749,035.84 = 1,217,985.14/x
  3. Step 3: Cross multiply
    1,991,900.72x = 2,749,035.84 × 1,217,985.14
  4. Step 4: Simplify right side
    1,991,900.72x = 3,348,284,802,447.42
  5. Step 5: Solve for x
    x = 3,348,284,802,447.42/1,991,900.72
  6. Step 6: Final answer
    x = 1,680,949.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.