Home / 3,620.76-5,431.66-1,312.80

Finding the Fourth Proportional to 3,620.76, 5,431.66 and 1,312.80

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Solution

The fourth proportional to 3,620.76, 5,431.66 and 1,312.80 is: 1,969.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.76 : 5,431.66 = 1,312.80 : x
  2. Step 2: Convert to fraction form
    3,620.76/5,431.66 = 1,312.80/x
  3. Step 3: Cross multiply
    3,620.76x = 5,431.66 × 1,312.80
  4. Step 4: Simplify right side
    3,620.76x = 7,130,683.25
  5. Step 5: Solve for x
    x = 7,130,683.25/3,620.76
  6. Step 6: Final answer
    x = 1,969.39

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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.