Home / 1,289.95-1,923.59-1,278.25

Finding the Fourth Proportional to 1,289.95, 1,923.59 and 1,278.25

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Solution

The fourth proportional to 1,289.95, 1,923.59 and 1,278.25 is: 1,906.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289.95 : 1,923.59 = 1,278.25 : x
  2. Step 2: Convert to fraction form
    1,289.95/1,923.59 = 1,278.25/x
  3. Step 3: Cross multiply
    1,289.95x = 1,923.59 × 1,278.25
  4. Step 4: Simplify right side
    1,289.95x = 2,458,828.92
  5. Step 5: Solve for x
    x = 2,458,828.92/1,289.95
  6. Step 6: Final answer
    x = 1,906.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.