Home / 1,688.19-2,327.40-1,163.31

Finding the Fourth Proportional to 1,688.19, 2,327.40 and 1,163.31

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Solution

The fourth proportional to 1,688.19, 2,327.40 and 1,163.31 is: 1,603.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.19 : 2,327.40 = 1,163.31 : x
  2. Step 2: Convert to fraction form
    1,688.19/2,327.40 = 1,163.31/x
  3. Step 3: Cross multiply
    1,688.19x = 2,327.40 × 1,163.31
  4. Step 4: Simplify right side
    1,688.19x = 2,707,487.69
  5. Step 5: Solve for x
    x = 2,707,487.69/1,688.19
  6. Step 6: Final answer
    x = 1,603.78

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1.5x scale

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.