Home / 3,618.75-5,428.86-1,278.66

Finding the Fourth Proportional to 3,618.75, 5,428.86 and 1,278.66

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Solution

The fourth proportional to 3,618.75, 5,428.86 and 1,278.66 is: 1,918.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,618.75 : 5,428.86 = 1,278.66 : x
  2. Step 2: Convert to fraction form
    3,618.75/5,428.86 = 1,278.66/x
  3. Step 3: Cross multiply
    3,618.75x = 5,428.86 × 1,278.66
  4. Step 4: Simplify right side
    3,618.75x = 6,941,666.13
  5. Step 5: Solve for x
    x = 6,941,666.13/3,618.75
  6. Step 6: Final answer
    x = 1,918.25

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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.