Home / 1,120.39-1,680.67-298.66

Finding the Fourth Proportional to 1,120.39, 1,680.67 and 298.66

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Solution

The fourth proportional to 1,120.39, 1,680.67 and 298.66 is: 448.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.39 : 1,680.67 = 298.66 : x
  2. Step 2: Convert to fraction form
    1,120.39/1,680.67 = 298.66/x
  3. Step 3: Cross multiply
    1,120.39x = 1,680.67 × 298.66
  4. Step 4: Simplify right side
    1,120.39x = 501,948.90
  5. Step 5: Solve for x
    x = 501,948.90/1,120.39
  6. Step 6: Final answer
    x = 448.01

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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.