Home / 3,854.70-5,782.14-1,389.72

Finding the Fourth Proportional to 3,854.70, 5,782.14 and 1,389.72

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Solution

The fourth proportional to 3,854.70, 5,782.14 and 1,389.72 is: 2,084.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.70 : 5,782.14 = 1,389.72 : x
  2. Step 2: Convert to fraction form
    3,854.70/5,782.14 = 1,389.72/x
  3. Step 3: Cross multiply
    3,854.70x = 5,782.14 × 1,389.72
  4. Step 4: Simplify right side
    3,854.70x = 8,035,555.60
  5. Step 5: Solve for x
    x = 8,035,555.60/3,854.70
  6. Step 6: Final answer
    x = 2,084.61

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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.