Home / 2,870.40-3,961.12-2,170.56

Finding the Fourth Proportional to 2,870.40, 3,961.12 and 2,170.56

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Solution

The fourth proportional to 2,870.40, 3,961.12 and 2,170.56 is: 2,995.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.40 : 3,961.12 = 2,170.56 : x
  2. Step 2: Convert to fraction form
    2,870.40/3,961.12 = 2,170.56/x
  3. Step 3: Cross multiply
    2,870.40x = 3,961.12 × 2,170.56
  4. Step 4: Simplify right side
    2,870.40x = 8,597,848.63
  5. Step 5: Solve for x
    x = 8,597,848.63/2,870.40
  6. Step 6: Final answer
    x = 2,995.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.