Home / 1,622.88-2,238.12-1,290.76

Finding the Fourth Proportional to 1,622.88, 2,238.12 and 1,290.76

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Solution

The fourth proportional to 1,622.88, 2,238.12 and 1,290.76 is: 1,780.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.88 : 2,238.12 = 1,290.76 : x
  2. Step 2: Convert to fraction form
    1,622.88/2,238.12 = 1,290.76/x
  3. Step 3: Cross multiply
    1,622.88x = 2,238.12 × 1,290.76
  4. Step 4: Simplify right side
    1,622.88x = 2,888,875.77
  5. Step 5: Solve for x
    x = 2,888,875.77/1,622.88
  6. Step 6: Final answer
    x = 1,780.09

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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.