Home / 3,790.87-5,685.86-1,325.72

Finding the Fourth Proportional to 3,790.87, 5,685.86 and 1,325.72

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Solution

The fourth proportional to 3,790.87, 5,685.86 and 1,325.72 is: 1,988.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,790.87 : 5,685.86 = 1,325.72 : x
  2. Step 2: Convert to fraction form
    3,790.87/5,685.86 = 1,325.72/x
  3. Step 3: Cross multiply
    3,790.87x = 5,685.86 × 1,325.72
  4. Step 4: Simplify right side
    3,790.87x = 7,537,875.85
  5. Step 5: Solve for x
    x = 7,537,875.85/3,790.87
  6. Step 6: Final answer
    x = 1,988.43

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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.