Home / 1,298.04-1,943.28-680.28

Finding the Fourth Proportional to 1,298.04, 1,943.28 and 680.28

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Solution

The fourth proportional to 1,298.04, 1,943.28 and 680.28 is: 1,018.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.04 : 1,943.28 = 680.28 : x
  2. Step 2: Convert to fraction form
    1,298.04/1,943.28 = 680.28/x
  3. Step 3: Cross multiply
    1,298.04x = 1,943.28 × 680.28
  4. Step 4: Simplify right side
    1,298.04x = 1,321,974.52
  5. Step 5: Solve for x
    x = 1,321,974.52/1,298.04
  6. Step 6: Final answer
    x = 1,018.44

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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.