Home / 1,555.12-2,145.45-1,082.89

Finding the Fourth Proportional to 1,555.12, 2,145.45 and 1,082.89

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Solution

The fourth proportional to 1,555.12, 2,145.45 and 1,082.89 is: 1,493.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.12 : 2,145.45 = 1,082.89 : x
  2. Step 2: Convert to fraction form
    1,555.12/2,145.45 = 1,082.89/x
  3. Step 3: Cross multiply
    1,555.12x = 2,145.45 × 1,082.89
  4. Step 4: Simplify right side
    1,555.12x = 2,323,286.35
  5. Step 5: Solve for x
    x = 2,323,286.35/1,555.12
  6. Step 6: Final answer
    x = 1,493.96

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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.