Home / 1,731.42-2,390.18-1,311.84

Finding the Fourth Proportional to 1,731.42, 2,390.18 and 1,311.84

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Solution

The fourth proportional to 1,731.42, 2,390.18 and 1,311.84 is: 1,810.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,731.42 : 2,390.18 = 1,311.84 : x
  2. Step 2: Convert to fraction form
    1,731.42/2,390.18 = 1,311.84/x
  3. Step 3: Cross multiply
    1,731.42x = 2,390.18 × 1,311.84
  4. Step 4: Simplify right side
    1,731.42x = 3,135,527.17
  5. Step 5: Solve for x
    x = 3,135,527.17/1,731.42
  6. Step 6: Final answer
    x = 1,810.96

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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.