Home / 1,120.17-1,680.25-298.40

Finding the Fourth Proportional to 1,120.17, 1,680.25 and 298.40

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Solution

The fourth proportional to 1,120.17, 1,680.25 and 298.40 is: 447.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.17 : 1,680.25 = 298.40 : x
  2. Step 2: Convert to fraction form
    1,120.17/1,680.25 = 298.40/x
  3. Step 3: Cross multiply
    1,120.17x = 1,680.25 × 298.40
  4. Step 4: Simplify right side
    1,120.17x = 501,386.60
  5. Step 5: Solve for x
    x = 501,386.60/1,120.17
  6. Step 6: Final answer
    x = 447.60

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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.