Home / 1,611.38-2,417.90-1,221.23

Finding the Fourth Proportional to 1,611.38, 2,417.90 and 1,221.23

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Solution

The fourth proportional to 1,611.38, 2,417.90 and 1,221.23 is: 1,832.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,611.38 : 2,417.90 = 1,221.23 : x
  2. Step 2: Convert to fraction form
    1,611.38/2,417.90 = 1,221.23/x
  3. Step 3: Cross multiply
    1,611.38x = 2,417.90 × 1,221.23
  4. Step 4: Simplify right side
    1,611.38x = 2,952,811.96
  5. Step 5: Solve for x
    x = 2,952,811.96/1,611.38
  6. Step 6: Final answer
    x = 1,832.47

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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.