Home / 2,807.12-3,873.96-1,688.12

Finding the Fourth Proportional to 2,807.12, 3,873.96 and 1,688.12

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Solution

The fourth proportional to 2,807.12, 3,873.96 and 1,688.12 is: 2,329.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.12 : 3,873.96 = 1,688.12 : x
  2. Step 2: Convert to fraction form
    2,807.12/3,873.96 = 1,688.12/x
  3. Step 3: Cross multiply
    2,807.12x = 3,873.96 × 1,688.12
  4. Step 4: Simplify right side
    2,807.12x = 6,539,709.36
  5. Step 5: Solve for x
    x = 6,539,709.36/2,807.12
  6. Step 6: Final answer
    x = 2,329.69

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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.