Home / 2,618.87-3,618.68-1,871.51

Finding the Fourth Proportional to 2,618.87, 3,618.68 and 1,871.51

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Solution

The fourth proportional to 2,618.87, 3,618.68 and 1,871.51 is: 2,585.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,618.87 : 3,618.68 = 1,871.51 : x
  2. Step 2: Convert to fraction form
    2,618.87/3,618.68 = 1,871.51/x
  3. Step 3: Cross multiply
    2,618.87x = 3,618.68 × 1,871.51
  4. Step 4: Simplify right side
    2,618.87x = 6,772,368.36
  5. Step 5: Solve for x
    x = 6,772,368.36/2,618.87
  6. Step 6: Final answer
    x = 2,585.99

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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.