Home / 1,688.45-2,336.45-1,439.37

Finding the Fourth Proportional to 1,688.45, 2,336.45 and 1,439.37

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Solution

The fourth proportional to 1,688.45, 2,336.45 and 1,439.37 is: 1,991.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,688.45 : 2,336.45 = 1,439.37 : x
  2. Step 2: Convert to fraction form
    1,688.45/2,336.45 = 1,439.37/x
  3. Step 3: Cross multiply
    1,688.45x = 2,336.45 × 1,439.37
  4. Step 4: Simplify right side
    1,688.45x = 3,363,008.84
  5. Step 5: Solve for x
    x = 3,363,008.84/1,688.45
  6. Step 6: Final answer
    x = 1,991.78

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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.