Home / 2,790.10-4,185.12-1,124.98

Finding the Fourth Proportional to 2,790.10, 4,185.12 and 1,124.98

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Solution

The fourth proportional to 2,790.10, 4,185.12 and 1,124.98 is: 1,687.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.10 : 4,185.12 = 1,124.98 : x
  2. Step 2: Convert to fraction form
    2,790.10/4,185.12 = 1,124.98/x
  3. Step 3: Cross multiply
    2,790.10x = 4,185.12 × 1,124.98
  4. Step 4: Simplify right side
    2,790.10x = 4,708,176.30
  5. Step 5: Solve for x
    x = 4,708,176.30/2,790.10
  6. Step 6: Final answer
    x = 1,687.46

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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.