Home / 1,416.88-1,955.60-1,278.40

Finding the Fourth Proportional to 1,416.88, 1,955.60 and 1,278.40

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Solution

The fourth proportional to 1,416.88, 1,955.60 and 1,278.40 is: 1,764.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.88 : 1,955.60 = 1,278.40 : x
  2. Step 2: Convert to fraction form
    1,416.88/1,955.60 = 1,278.40/x
  3. Step 3: Cross multiply
    1,416.88x = 1,955.60 × 1,278.40
  4. Step 4: Simplify right side
    1,416.88x = 2,500,039.04
  5. Step 5: Solve for x
    x = 2,500,039.04/1,416.88
  6. Step 6: Final answer
    x = 1,764.47

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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.