Home / 1,994.40-2,985.62-1,211.99

Finding the Fourth Proportional to 1,994.40, 2,985.62 and 1,211.99

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Solution

The fourth proportional to 1,994.40, 2,985.62 and 1,211.99 is: 1,814.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,994.40 : 2,985.62 = 1,211.99 : x
  2. Step 2: Convert to fraction form
    1,994.40/2,985.62 = 1,211.99/x
  3. Step 3: Cross multiply
    1,994.40x = 2,985.62 × 1,211.99
  4. Step 4: Simplify right side
    1,994.40x = 3,618,520.60
  5. Step 5: Solve for x
    x = 3,618,520.60/1,994.40
  6. Step 6: Final answer
    x = 1,814.34

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1.5x scale

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.