Home / 2,631.90-3,949.08-1,170.90

Finding the Fourth Proportional to 2,631.90, 3,949.08 and 1,170.90

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Solution

The fourth proportional to 2,631.90, 3,949.08 and 1,170.90 is: 1,756.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,631.90 : 3,949.08 = 1,170.90 : x
  2. Step 2: Convert to fraction form
    2,631.90/3,949.08 = 1,170.90/x
  3. Step 3: Cross multiply
    2,631.90x = 3,949.08 × 1,170.90
  4. Step 4: Simplify right side
    2,631.90x = 4,623,977.77
  5. Step 5: Solve for x
    x = 4,623,977.77/2,631.90
  6. Step 6: Final answer
    x = 1,756.90

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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.