Home / 1,688.36-2,538.30-1,327.50

Finding the Fourth Proportional to 1,688.36, 2,538.30 and 1,327.50

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Solution

The fourth proportional to 1,688.36, 2,538.30 and 1,327.50 is: 1,995.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.36 : 2,538.30 = 1,327.50 : x
  2. Step 2: Convert to fraction form
    1,688.36/2,538.30 = 1,327.50/x
  3. Step 3: Cross multiply
    1,688.36x = 2,538.30 × 1,327.50
  4. Step 4: Simplify right side
    1,688.36x = 3,369,593.25
  5. Step 5: Solve for x
    x = 3,369,593.25/1,688.36
  6. Step 6: Final answer
    x = 1,995.78

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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.