Home / 2,790.40-4,187.90-1,404.13

Finding the Fourth Proportional to 2,790.40, 4,187.90 and 1,404.13

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Solution

The fourth proportional to 2,790.40, 4,187.90 and 1,404.13 is: 2,107.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.40 : 4,187.90 = 1,404.13 : x
  2. Step 2: Convert to fraction form
    2,790.40/4,187.90 = 1,404.13/x
  3. Step 3: Cross multiply
    2,790.40x = 4,187.90 × 1,404.13
  4. Step 4: Simplify right side
    2,790.40x = 5,880,356.03
  5. Step 5: Solve for x
    x = 5,880,356.03/2,790.40
  6. Step 6: Final answer
    x = 2,107.35

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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.