Home / 3,620.75-5,431.67-1,312.79

Finding the Fourth Proportional to 3,620.75, 5,431.67 and 1,312.79

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Solution

The fourth proportional to 3,620.75, 5,431.67 and 1,312.79 is: 1,969.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.75 : 5,431.67 = 1,312.79 : x
  2. Step 2: Convert to fraction form
    3,620.75/5,431.67 = 1,312.79/x
  3. Step 3: Cross multiply
    3,620.75x = 5,431.67 × 1,312.79
  4. Step 4: Simplify right side
    3,620.75x = 7,130,642.06
  5. Step 5: Solve for x
    x = 7,130,642.06/3,620.75
  6. Step 6: Final answer
    x = 1,969.38

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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.