Home / 1,278.12-1,913.94-1,021.08

Finding the Fourth Proportional to 1,278.12, 1,913.94 and 1,021.08

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Solution

The fourth proportional to 1,278.12, 1,913.94 and 1,021.08 is: 1,529.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278.12 : 1,913.94 = 1,021.08 : x
  2. Step 2: Convert to fraction form
    1,278.12/1,913.94 = 1,021.08/x
  3. Step 3: Cross multiply
    1,278.12x = 1,913.94 × 1,021.08
  4. Step 4: Simplify right side
    1,278.12x = 1,954,285.86
  5. Step 5: Solve for x
    x = 1,954,285.86/1,278.12
  6. Step 6: Final answer
    x = 1,529.03

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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.