Home / 3,140.21-4,712.13-1,680.18

Finding the Fourth Proportional to 3,140.21, 4,712.13 and 1,680.18

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Solution

The fourth proportional to 3,140.21, 4,712.13 and 1,680.18 is: 2,521.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.21 : 4,712.13 = 1,680.18 : x
  2. Step 2: Convert to fraction form
    3,140.21/4,712.13 = 1,680.18/x
  3. Step 3: Cross multiply
    3,140.21x = 4,712.13 × 1,680.18
  4. Step 4: Simplify right side
    3,140.21x = 7,917,226.58
  5. Step 5: Solve for x
    x = 7,917,226.58/3,140.21
  6. Step 6: Final answer
    x = 2,521.25

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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.