Home / 2,688.45-3,710.37-1,640.51

Finding the Fourth Proportional to 2,688.45, 3,710.37 and 1,640.51

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Solution

The fourth proportional to 2,688.45, 3,710.37 and 1,640.51 is: 2,264.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.45 : 3,710.37 = 1,640.51 : x
  2. Step 2: Convert to fraction form
    2,688.45/3,710.37 = 1,640.51/x
  3. Step 3: Cross multiply
    2,688.45x = 3,710.37 × 1,640.51
  4. Step 4: Simplify right side
    2,688.45x = 6,086,899.09
  5. Step 5: Solve for x
    x = 6,086,899.09/2,688.45
  6. Step 6: Final answer
    x = 2,264.09

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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.