Home / 1,688.32-2,529.96-1,382.32

Finding the Fourth Proportional to 1,688.32, 2,529.96 and 1,382.32

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Solution

The fourth proportional to 1,688.32, 2,529.96 and 1,382.32 is: 2,071.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.32 : 2,529.96 = 1,382.32 : x
  2. Step 2: Convert to fraction form
    1,688.32/2,529.96 = 1,382.32/x
  3. Step 3: Cross multiply
    1,688.32x = 2,529.96 × 1,382.32
  4. Step 4: Simplify right side
    1,688.32x = 3,497,214.31
  5. Step 5: Solve for x
    x = 3,497,214.31/1,688.32
  6. Step 6: Final answer
    x = 2,071.42

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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.