Home / 1,359.09-2,038.77-628.88

Finding the Fourth Proportional to 1,359.09, 2,038.77 and 628.88

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Solution

The fourth proportional to 1,359.09, 2,038.77 and 628.88 is: 943.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,359.09 : 2,038.77 = 628.88 : x
  2. Step 2: Convert to fraction form
    1,359.09/2,038.77 = 628.88/x
  3. Step 3: Cross multiply
    1,359.09x = 2,038.77 × 628.88
  4. Step 4: Simplify right side
    1,359.09x = 1,282,141.68
  5. Step 5: Solve for x
    x = 1,282,141.68/1,359.09
  6. Step 6: Final answer
    x = 943.38

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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.