Home / 1,790.80-2,686.20-1,531.60

Finding the Fourth Proportional to 1,790.80, 2,686.20 and 1,531.60

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Solution

The fourth proportional to 1,790.80, 2,686.20 and 1,531.60 is: 2,297.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,790.80 : 2,686.20 = 1,531.60 : x
  2. Step 2: Convert to fraction form
    1,790.80/2,686.20 = 1,531.60/x
  3. Step 3: Cross multiply
    1,790.80x = 2,686.20 × 1,531.60
  4. Step 4: Simplify right side
    1,790.80x = 4,114,183.92
  5. Step 5: Solve for x
    x = 4,114,183.92/1,790.80
  6. Step 6: Final answer
    x = 2,297.40

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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.