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Finding the Fourth Proportional to 1,981,396.89, 2,734,328.34 and 1,075,978.89

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Solution

The fourth proportional to 1,981,396.89, 2,734,328.34 and 1,075,978.89 is: 1,484,851.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,396.89 : 2,734,328.34 = 1,075,978.89 : x
  2. Step 2: Convert to fraction form
    1,981,396.89/2,734,328.34 = 1,075,978.89/x
  3. Step 3: Cross multiply
    1,981,396.89x = 2,734,328.34 × 1,075,978.89
  4. Step 4: Simplify right side
    1,981,396.89x = 2,942,079,572,168.74
  5. Step 5: Solve for x
    x = 2,942,079,572,168.74/1,981,396.89
  6. Step 6: Final answer
    x = 1,484,851.21

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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.