Home / 1,680.96-2,521.62-815.16

Finding the Fourth Proportional to 1,680.96, 2,521.62 and 815.16

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Solution

The fourth proportional to 1,680.96, 2,521.62 and 815.16 is: 1,222.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.96 : 2,521.62 = 815.16 : x
  2. Step 2: Convert to fraction form
    1,680.96/2,521.62 = 815.16/x
  3. Step 3: Cross multiply
    1,680.96x = 2,521.62 × 815.16
  4. Step 4: Simplify right side
    1,680.96x = 2,055,523.76
  5. Step 5: Solve for x
    x = 2,055,523.76/1,680.96
  6. Step 6: Final answer
    x = 1,222.83

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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.