Home / 2,890.80-4,336.20-2,781.45

Finding the Fourth Proportional to 2,890.80, 4,336.20 and 2,781.45

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Solution

The fourth proportional to 2,890.80, 4,336.20 and 2,781.45 is: 4,172.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,890.80 : 4,336.20 = 2,781.45 : x
  2. Step 2: Convert to fraction form
    2,890.80/4,336.20 = 2,781.45/x
  3. Step 3: Cross multiply
    2,890.80x = 4,336.20 × 2,781.45
  4. Step 4: Simplify right side
    2,890.80x = 12,060,923.49
  5. Step 5: Solve for x
    x = 12,060,923.49/2,890.80
  6. Step 6: Final answer
    x = 4,172.18

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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.