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Finding the Fourth Proportional to 411,855.80, 618,129.30 and 201,673.40

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Solution

The fourth proportional to 411,855.80, 618,129.30 and 201,673.40 is: 302,679.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,855.80 : 618,129.30 = 201,673.40 : x
  2. Step 2: Convert to fraction form
    411,855.80/618,129.30 = 201,673.40/x
  3. Step 3: Cross multiply
    411,855.80x = 618,129.30 × 201,673.40
  4. Step 4: Simplify right side
    411,855.80x = 124,660,237,570.62
  5. Step 5: Solve for x
    x = 124,660,237,570.62/411,855.80
  6. Step 6: Final answer
    x = 302,679.33

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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.