Home / 3,129.20-4,318.20-1,802.89

Finding the Fourth Proportional to 3,129.20, 4,318.20 and 1,802.89

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Solution

The fourth proportional to 3,129.20, 4,318.20 and 1,802.89 is: 2,487.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.20 : 4,318.20 = 1,802.89 : x
  2. Step 2: Convert to fraction form
    3,129.20/4,318.20 = 1,802.89/x
  3. Step 3: Cross multiply
    3,129.20x = 4,318.20 × 1,802.89
  4. Step 4: Simplify right side
    3,129.20x = 7,785,239.60
  5. Step 5: Solve for x
    x = 7,785,239.60/3,129.20
  6. Step 6: Final answer
    x = 2,487.93

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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.