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Finding the Fourth Proportional to 1,992,421.06, 2,749,752.90 and 1,218,504.67

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Solution

The fourth proportional to 1,992,421.06, 2,749,752.90 and 1,218,504.67 is: 1,681,666.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,421.06 : 2,749,752.90 = 1,218,504.67 : x
  2. Step 2: Convert to fraction form
    1,992,421.06/2,749,752.90 = 1,218,504.67/x
  3. Step 3: Cross multiply
    1,992,421.06x = 2,749,752.90 × 1,218,504.67
  4. Step 4: Simplify right side
    1,992,421.06x = 3,350,586,743,121.66
  5. Step 5: Solve for x
    x = 3,350,586,743,121.66/1,992,421.06
  6. Step 6: Final answer
    x = 1,681,666.00

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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.