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Finding the Fourth Proportional to 1,993,679.40, 2,986,955.10 and 1,213,271.40

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Solution

The fourth proportional to 1,993,679.40, 2,986,955.10 and 1,213,271.40 is: 1,817,738.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993,679.40 : 2,986,955.10 = 1,213,271.40 : x
  2. Step 2: Convert to fraction form
    1,993,679.40/2,986,955.10 = 1,213,271.40/x
  3. Step 3: Cross multiply
    1,993,679.40x = 2,986,955.10 × 1,213,271.40
  4. Step 4: Simplify right side
    1,993,679.40x = 3,623,987,195,914.14
  5. Step 5: Solve for x
    x = 3,623,987,195,914.14/1,993,679.40
  6. Step 6: Final answer
    x = 1,817,738.20

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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.