Home / 2,870.12-3,960.84-1,611.14

Finding the Fourth Proportional to 2,870.12, 3,960.84 and 1,611.14

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Solution

The fourth proportional to 2,870.12, 3,960.84 and 1,611.14 is: 2,223.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.12 : 3,960.84 = 1,611.14 : x
  2. Step 2: Convert to fraction form
    2,870.12/3,960.84 = 1,611.14/x
  3. Step 3: Cross multiply
    2,870.12x = 3,960.84 × 1,611.14
  4. Step 4: Simplify right side
    2,870.12x = 6,381,467.76
  5. Step 5: Solve for x
    x = 6,381,467.76/2,870.12
  6. Step 6: Final answer
    x = 2,223.41

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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.