Home / 2,680.63-3,699.51-1,561.68

Finding the Fourth Proportional to 2,680.63, 3,699.51 and 1,561.68

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Solution

The fourth proportional to 2,680.63, 3,699.51 and 1,561.68 is: 2,155.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,680.63 : 3,699.51 = 1,561.68 : x
  2. Step 2: Convert to fraction form
    2,680.63/3,699.51 = 1,561.68/x
  3. Step 3: Cross multiply
    2,680.63x = 3,699.51 × 1,561.68
  4. Step 4: Simplify right side
    2,680.63x = 5,777,444.92
  5. Step 5: Solve for x
    x = 5,777,444.92/2,680.63
  6. Step 6: Final answer
    x = 2,155.26

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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.