Home / 2,580.63-3,870.95-1,281.80

Finding the Fourth Proportional to 2,580.63, 3,870.95 and 1,281.80

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Solution

The fourth proportional to 2,580.63, 3,870.95 and 1,281.80 is: 1,922.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.63 : 3,870.95 = 1,281.80 : x
  2. Step 2: Convert to fraction form
    2,580.63/3,870.95 = 1,281.80/x
  3. Step 3: Cross multiply
    2,580.63x = 3,870.95 × 1,281.80
  4. Step 4: Simplify right side
    2,580.63x = 4,961,757.95
  5. Step 5: Solve for x
    x = 4,961,757.95/2,580.63
  6. Step 6: Final answer
    x = 1,922.69

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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.