Home / 3,139.30-4,705.86-1,385.26

Finding the Fourth Proportional to 3,139.30, 4,705.86 and 1,385.26

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Solution

The fourth proportional to 3,139.30, 4,705.86 and 1,385.26 is: 2,076.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,139.30 : 4,705.86 = 1,385.26 : x
  2. Step 2: Convert to fraction form
    3,139.30/4,705.86 = 1,385.26/x
  3. Step 3: Cross multiply
    3,139.30x = 4,705.86 × 1,385.26
  4. Step 4: Simplify right side
    3,139.30x = 6,518,839.62
  5. Step 5: Solve for x
    x = 6,518,839.62/3,139.30
  6. Step 6: Final answer
    x = 2,076.53

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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.