Home / 2,870.85-3,961.67-1,611.78

Finding the Fourth Proportional to 2,870.85, 3,961.67 and 1,611.78

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Solution

The fourth proportional to 2,870.85, 3,961.67 and 1,611.78 is: 2,224.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,870.85 : 3,961.67 = 1,611.78 : x
  2. Step 2: Convert to fraction form
    2,870.85/3,961.67 = 1,611.78/x
  3. Step 3: Cross multiply
    2,870.85x = 3,961.67 × 1,611.78
  4. Step 4: Simplify right side
    2,870.85x = 6,385,332.41
  5. Step 5: Solve for x
    x = 6,385,332.41/2,870.85
  6. Step 6: Final answer
    x = 2,224.20

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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.