Home / 1,521.56-2,099.70-1,080.20

Finding the Fourth Proportional to 1,521.56, 2,099.70 and 1,080.20

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Solution

The fourth proportional to 1,521.56, 2,099.70 and 1,080.20 is: 1,490.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.56 : 2,099.70 = 1,080.20 : x
  2. Step 2: Convert to fraction form
    1,521.56/2,099.70 = 1,080.20/x
  3. Step 3: Cross multiply
    1,521.56x = 2,099.70 × 1,080.20
  4. Step 4: Simplify right side
    1,521.56x = 2,268,095.94
  5. Step 5: Solve for x
    x = 2,268,095.94/1,521.56
  6. Step 6: Final answer
    x = 1,490.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.