Home / 2,812.40-4,222.65-1,994.30

Finding the Fourth Proportional to 2,812.40, 4,222.65 and 1,994.30

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Solution

The fourth proportional to 2,812.40, 4,222.65 and 1,994.30 is: 2,994.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.40 : 4,222.65 = 1,994.30 : x
  2. Step 2: Convert to fraction form
    2,812.40/4,222.65 = 1,994.30/x
  3. Step 3: Cross multiply
    2,812.40x = 4,222.65 × 1,994.30
  4. Step 4: Simplify right side
    2,812.40x = 8,421,230.90
  5. Step 5: Solve for x
    x = 8,421,230.90/2,812.40
  6. Step 6: Final answer
    x = 2,994.32

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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.