Home / 1,329.03-1,988.69-1,112.76

Finding the Fourth Proportional to 1,329.03, 1,988.69 and 1,112.76

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Solution

The fourth proportional to 1,329.03, 1,988.69 and 1,112.76 is: 1,665.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.03 : 1,988.69 = 1,112.76 : x
  2. Step 2: Convert to fraction form
    1,329.03/1,988.69 = 1,112.76/x
  3. Step 3: Cross multiply
    1,329.03x = 1,988.69 × 1,112.76
  4. Step 4: Simplify right side
    1,329.03x = 2,212,929.12
  5. Step 5: Solve for x
    x = 2,212,929.12/1,329.03
  6. Step 6: Final answer
    x = 1,665.07

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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.