Home / 1,719.20-2,577.65-1,390.55

Finding the Fourth Proportional to 1,719.20, 2,577.65 and 1,390.55

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Solution

The fourth proportional to 1,719.20, 2,577.65 and 1,390.55 is: 2,084.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,719.20 : 2,577.65 = 1,390.55 : x
  2. Step 2: Convert to fraction form
    1,719.20/2,577.65 = 1,390.55/x
  3. Step 3: Cross multiply
    1,719.20x = 2,577.65 × 1,390.55
  4. Step 4: Simplify right side
    1,719.20x = 3,584,331.37
  5. Step 5: Solve for x
    x = 3,584,331.37/1,719.20
  6. Step 6: Final answer
    x = 2,084.88

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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.