Home / 1,620.52-2,428.38-1,207.72

Finding the Fourth Proportional to 1,620.52, 2,428.38 and 1,207.72

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Solution

The fourth proportional to 1,620.52, 2,428.38 and 1,207.72 is: 1,809.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.52 : 2,428.38 = 1,207.72 : x
  2. Step 2: Convert to fraction form
    1,620.52/2,428.38 = 1,207.72/x
  3. Step 3: Cross multiply
    1,620.52x = 2,428.38 × 1,207.72
  4. Step 4: Simplify right side
    1,620.52x = 2,932,803.09
  5. Step 5: Solve for x
    x = 2,932,803.09/1,620.52
  6. Step 6: Final answer
    x = 1,809.79

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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.