Home / 1,120.44-1,680.11-340.30

Finding the Fourth Proportional to 1,120.44, 1,680.11 and 340.30

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Solution

The fourth proportional to 1,120.44, 1,680.11 and 340.30 is: 510.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,120.44 : 1,680.11 = 340.30 : x
  2. Step 2: Convert to fraction form
    1,120.44/1,680.11 = 340.30/x
  3. Step 3: Cross multiply
    1,120.44x = 1,680.11 × 340.30
  4. Step 4: Simplify right side
    1,120.44x = 571,733.03
  5. Step 5: Solve for x
    x = 571,733.03/1,120.44
  6. Step 6: Final answer
    x = 510.28

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Double scale
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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.