Home / 3,015.12-4,160.79-1,688.91

Finding the Fourth Proportional to 3,015.12, 4,160.79 and 1,688.91

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Solution

The fourth proportional to 3,015.12, 4,160.79 and 1,688.91 is: 2,330.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,015.12 : 4,160.79 = 1,688.91 : x
  2. Step 2: Convert to fraction form
    3,015.12/4,160.79 = 1,688.91/x
  3. Step 3: Cross multiply
    3,015.12x = 4,160.79 × 1,688.91
  4. Step 4: Simplify right side
    3,015.12x = 7,027,199.84
  5. Step 5: Solve for x
    x = 7,027,199.84/3,015.12
  6. Step 6: Final answer
    x = 2,330.65

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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.