Home / 3,618.51-5,428.52-1,278.56

Finding the Fourth Proportional to 3,618.51, 5,428.52 and 1,278.56

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Solution

The fourth proportional to 3,618.51, 5,428.52 and 1,278.56 is: 1,918.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.51 : 5,428.52 = 1,278.56 : x
  2. Step 2: Convert to fraction form
    3,618.51/5,428.52 = 1,278.56/x
  3. Step 3: Cross multiply
    3,618.51x = 5,428.52 × 1,278.56
  4. Step 4: Simplify right side
    3,618.51x = 6,940,655.00
  5. Step 5: Solve for x
    x = 6,940,655.00/3,618.51
  6. Step 6: Final answer
    x = 1,918.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.