Home / 2,807.42-3,873.78-1,688.09

Finding the Fourth Proportional to 2,807.42, 3,873.78 and 1,688.09

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Solution

The fourth proportional to 2,807.42, 3,873.78 and 1,688.09 is: 2,329.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,807.42 : 3,873.78 = 1,688.09 : x
  2. Step 2: Convert to fraction form
    2,807.42/3,873.78 = 1,688.09/x
  3. Step 3: Cross multiply
    2,807.42x = 3,873.78 × 1,688.09
  4. Step 4: Simplify right side
    2,807.42x = 6,539,269.91
  5. Step 5: Solve for x
    x = 6,539,269.91/2,807.42
  6. Step 6: Final answer
    x = 2,329.29

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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.