Home / 1,120.16-1,680.10-298.50

Finding the Fourth Proportional to 1,120.16, 1,680.10 and 298.50

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Solution

The fourth proportional to 1,120.16, 1,680.10 and 298.50 is: 447.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.16 : 1,680.10 = 298.50 : x
  2. Step 2: Convert to fraction form
    1,120.16/1,680.10 = 298.50/x
  3. Step 3: Cross multiply
    1,120.16x = 1,680.10 × 298.50
  4. Step 4: Simplify right side
    1,120.16x = 501,509.85
  5. Step 5: Solve for x
    x = 501,509.85/1,120.16
  6. Step 6: Final answer
    x = 447.71

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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.