Home / 1,890.60-2,840-1,644.55

Finding the Fourth Proportional to 1,890.60, 2,840 and 1,644.55

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Solution

The fourth proportional to 1,890.60, 2,840 and 1,644.55 is: 2,470.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890.60 : 2,840 = 1,644.55 : x
  2. Step 2: Convert to fraction form
    1,890.60/2,840 = 1,644.55/x
  3. Step 3: Cross multiply
    1,890.60x = 2,840 × 1,644.55
  4. Step 4: Simplify right side
    1,890.60x = 4,670,522
  5. Step 5: Solve for x
    x = 4,670,522/1,890.60
  6. Step 6: Final answer
    x = 2,470.39

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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.