Home / 3,129.08-4,318.32-1,731.92

Finding the Fourth Proportional to 3,129.08, 4,318.32 and 1,731.92

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Solution

The fourth proportional to 3,129.08, 4,318.32 and 1,731.92 is: 2,390.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.08 : 4,318.32 = 1,731.92 : x
  2. Step 2: Convert to fraction form
    3,129.08/4,318.32 = 1,731.92/x
  3. Step 3: Cross multiply
    3,129.08x = 4,318.32 × 1,731.92
  4. Step 4: Simplify right side
    3,129.08x = 7,478,984.77
  5. Step 5: Solve for x
    x = 7,478,984.77/3,129.08
  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.