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Finding the Fourth Proportional to 447,075.76, 618,589.18 and 389,834.44

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Solution

The fourth proportional to 447,075.76, 618,589.18 and 389,834.44 is: 539,388.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,075.76 : 618,589.18 = 389,834.44 : x
  2. Step 2: Convert to fraction form
    447,075.76/618,589.18 = 389,834.44/x
  3. Step 3: Cross multiply
    447,075.76x = 618,589.18 × 389,834.44
  4. Step 4: Simplify right side
    447,075.76x = 241,147,366,575.36
  5. Step 5: Solve for x
    x = 241,147,366,575.36/447,075.76
  6. Step 6: Final answer
    x = 539,388.15

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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.