Home / 2,858.16-3,942.12-1,972.56

Finding the Fourth Proportional to 2,858.16, 3,942.12 and 1,972.56

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Solution

The fourth proportional to 2,858.16, 3,942.12 and 1,972.56 is: 2,720.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,858.16 : 3,942.12 = 1,972.56 : x
  2. Step 2: Convert to fraction form
    2,858.16/3,942.12 = 1,972.56/x
  3. Step 3: Cross multiply
    2,858.16x = 3,942.12 × 1,972.56
  4. Step 4: Simplify right side
    2,858.16x = 7,776,068.23
  5. Step 5: Solve for x
    x = 7,776,068.23/2,858.16
  6. Step 6: Final answer
    x = 2,720.66

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1.5x scale

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.