Home / 1,765.85-2,434.05-1,392.21

Finding the Fourth Proportional to 1,765.85, 2,434.05 and 1,392.21

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Solution

The fourth proportional to 1,765.85, 2,434.05 and 1,392.21 is: 1,919.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,765.85 : 2,434.05 = 1,392.21 : x
  2. Step 2: Convert to fraction form
    1,765.85/2,434.05 = 1,392.21/x
  3. Step 3: Cross multiply
    1,765.85x = 2,434.05 × 1,392.21
  4. Step 4: Simplify right side
    1,765.85x = 3,388,708.75
  5. Step 5: Solve for x
    x = 3,388,708.75/1,765.85
  6. Step 6: Final answer
    x = 1,919.02

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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.