Home / 3,854.10-5,780.34-1,389.06

Finding the Fourth Proportional to 3,854.10, 5,780.34 and 1,389.06

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Solution

The fourth proportional to 3,854.10, 5,780.34 and 1,389.06 is: 2,083.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,854.10 : 5,780.34 = 1,389.06 : x
  2. Step 2: Convert to fraction form
    3,854.10/5,780.34 = 1,389.06/x
  3. Step 3: Cross multiply
    3,854.10x = 5,780.34 × 1,389.06
  4. Step 4: Simplify right side
    3,854.10x = 8,029,239.08
  5. Step 5: Solve for x
    x = 8,029,239.08/3,854.10
  6. Step 6: Final answer
    x = 2,083.30

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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.