Home / 3,239.65-4,471.20-1,981.45

Finding the Fourth Proportional to 3,239.65, 4,471.20 and 1,981.45

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Solution

The fourth proportional to 3,239.65, 4,471.20 and 1,981.45 is: 2,734.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,239.65 : 4,471.20 = 1,981.45 : x
  2. Step 2: Convert to fraction form
    3,239.65/4,471.20 = 1,981.45/x
  3. Step 3: Cross multiply
    3,239.65x = 4,471.20 × 1,981.45
  4. Step 4: Simplify right side
    3,239.65x = 8,859,459.24
  5. Step 5: Solve for x
    x = 8,859,459.24/3,239.65
  6. Step 6: Final answer
    x = 2,734.70

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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.