Home / 2,811.60-4,219.98-1,425.90

Finding the Fourth Proportional to 2,811.60, 4,219.98 and 1,425.90

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Solution

The fourth proportional to 2,811.60, 4,219.98 and 1,425.90 is: 2,140.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.60 : 4,219.98 = 1,425.90 : x
  2. Step 2: Convert to fraction form
    2,811.60/4,219.98 = 1,425.90/x
  3. Step 3: Cross multiply
    2,811.60x = 4,219.98 × 1,425.90
  4. Step 4: Simplify right side
    2,811.60x = 6,017,269.48
  5. Step 5: Solve for x
    x = 6,017,269.48/2,811.60
  6. Step 6: Final answer
    x = 2,140.16

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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.