Home / 4,742.31-7,112.66-1,278.75

Finding the Fourth Proportional to 4,742.31, 7,112.66 and 1,278.75

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Solution

The fourth proportional to 4,742.31, 7,112.66 and 1,278.75 is: 1,917.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,742.31 : 7,112.66 = 1,278.75 : x
  2. Step 2: Convert to fraction form
    4,742.31/7,112.66 = 1,278.75/x
  3. Step 3: Cross multiply
    4,742.31x = 7,112.66 × 1,278.75
  4. Step 4: Simplify right side
    4,742.31x = 9,095,307.58
  5. Step 5: Solve for x
    x = 9,095,307.58/4,742.31
  6. Step 6: Final answer
    x = 1,917.91

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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.