Home / 3,129.50-4,318.34-1,803.64

Finding the Fourth Proportional to 3,129.50, 4,318.34 and 1,803.64

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Solution

The fourth proportional to 3,129.50, 4,318.34 and 1,803.64 is: 2,488.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,129.50 : 4,318.34 = 1,803.64 : x
  2. Step 2: Convert to fraction form
    3,129.50/4,318.34 = 1,803.64/x
  3. Step 3: Cross multiply
    3,129.50x = 4,318.34 × 1,803.64
  4. Step 4: Simplify right side
    3,129.50x = 7,788,730.76
  5. Step 5: Solve for x
    x = 7,788,730.76/3,129.50
  6. Step 6: Final answer
    x = 2,488.81

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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.