Home / 3,129.90-4,318.95-1,732.56

Finding the Fourth Proportional to 3,129.90, 4,318.95 and 1,732.56

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Solution

The fourth proportional to 3,129.90, 4,318.95 and 1,732.56 is: 2,390.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.90 : 4,318.95 = 1,732.56 : x
  2. Step 2: Convert to fraction form
    3,129.90/4,318.95 = 1,732.56/x
  3. Step 3: Cross multiply
    3,129.90x = 4,318.95 × 1,732.56
  4. Step 4: Simplify right side
    3,129.90x = 7,482,840.01
  5. Step 5: Solve for x
    x = 7,482,840.01/3,129.90
  6. Step 6: Final answer
    x = 2,390.76

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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.