Home / 1,929.84-2,889.24-1,279.28

Finding the Fourth Proportional to 1,929.84, 2,889.24 and 1,279.28

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Solution

The fourth proportional to 1,929.84, 2,889.24 and 1,279.28 is: 1,915.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,929.84 : 2,889.24 = 1,279.28 : x
  2. Step 2: Convert to fraction form
    1,929.84/2,889.24 = 1,279.28/x
  3. Step 3: Cross multiply
    1,929.84x = 2,889.24 × 1,279.28
  4. Step 4: Simplify right side
    1,929.84x = 3,696,146.95
  5. Step 5: Solve for x
    x = 3,696,146.95/1,929.84
  6. Step 6: Final answer
    x = 1,915.26

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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.