Home / 2,580.30-3,870.45-1,281.87

Finding the Fourth Proportional to 2,580.30, 3,870.45 and 1,281.87

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Solution

The fourth proportional to 2,580.30, 3,870.45 and 1,281.87 is: 1,922.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,580.30 : 3,870.45 = 1,281.87 : x
  2. Step 2: Convert to fraction form
    2,580.30/3,870.45 = 1,281.87/x
  3. Step 3: Cross multiply
    2,580.30x = 3,870.45 × 1,281.87
  4. Step 4: Simplify right side
    2,580.30x = 4,961,413.74
  5. Step 5: Solve for x
    x = 4,961,413.74/2,580.30
  6. Step 6: Final answer
    x = 1,922.81

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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.