Home / 3,129.32-4,318.20-1,732.10

Finding the Fourth Proportional to 3,129.32, 4,318.20 and 1,732.10

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Solution

The fourth proportional to 3,129.32, 4,318.20 and 1,732.10 is: 2,390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.32 : 4,318.20 = 1,732.10 : x
  2. Step 2: Convert to fraction form
    3,129.32/4,318.20 = 1,732.10/x
  3. Step 3: Cross multiply
    3,129.32x = 4,318.20 × 1,732.10
  4. Step 4: Simplify right side
    3,129.32x = 7,479,554.22
  5. Step 5: Solve for x
    x = 7,479,554.22/3,129.32
  6. Step 6: Final answer
    x = 2,390.15

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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.