Home / 1,580.81-2,178.77-1,399.77

Finding the Fourth Proportional to 1,580.81, 2,178.77 and 1,399.77

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Solution

The fourth proportional to 1,580.81, 2,178.77 and 1,399.77 is: 1,929.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,580.81 : 2,178.77 = 1,399.77 : x
  2. Step 2: Convert to fraction form
    1,580.81/2,178.77 = 1,399.77/x
  3. Step 3: Cross multiply
    1,580.81x = 2,178.77 × 1,399.77
  4. Step 4: Simplify right side
    1,580.81x = 3,049,769.88
  5. Step 5: Solve for x
    x = 3,049,769.88/1,580.81
  6. Step 6: Final answer
    x = 1,929.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.