Home / 1,929.63-2,663.70-1,231.41

Finding the Fourth Proportional to 1,929.63, 2,663.70 and 1,231.41

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Solution

The fourth proportional to 1,929.63, 2,663.70 and 1,231.41 is: 1,699.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.63 : 2,663.70 = 1,231.41 : x
  2. Step 2: Convert to fraction form
    1,929.63/2,663.70 = 1,231.41/x
  3. Step 3: Cross multiply
    1,929.63x = 2,663.70 × 1,231.41
  4. Step 4: Simplify right side
    1,929.63x = 3,280,106.82
  5. Step 5: Solve for x
    x = 3,280,106.82/1,929.63
  6. Step 6: Final answer
    x = 1,699.86

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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.