Home / 2,790.40-4,186.16-1,402.60

Finding the Fourth Proportional to 2,790.40, 4,186.16 and 1,402.60

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Solution

The fourth proportional to 2,790.40, 4,186.16 and 1,402.60 is: 2,104.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.40 : 4,186.16 = 1,402.60 : x
  2. Step 2: Convert to fraction form
    2,790.40/4,186.16 = 1,402.60/x
  3. Step 3: Cross multiply
    2,790.40x = 4,186.16 × 1,402.60
  4. Step 4: Simplify right side
    2,790.40x = 5,871,508.02
  5. Step 5: Solve for x
    x = 5,871,508.02/2,790.40
  6. Step 6: Final answer
    x = 2,104.18

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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.