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Finding the Fourth Proportional to 3,320.92, 4,981.38 and 1,860.07

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Solution

The fourth proportional to 3,320.92, 4,981.38 and 1,860.07 is: 2,790.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,320.92 : 4,981.38 = 1,860.07 : x
  2. Step 2: Convert to fraction form
    3,320.92/4,981.38 = 1,860.07/x
  3. Step 3: Cross multiply
    3,320.92x = 4,981.38 × 1,860.07
  4. Step 4: Simplify right side
    3,320.92x = 9,265,715.50
  5. Step 5: Solve for x
    x = 9,265,715.50/3,320.92
  6. Step 6: Final answer
    x = 2,790.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.