Home / 3,318.90-4,971.86-1,561.62

Finding the Fourth Proportional to 3,318.90, 4,971.86 and 1,561.62

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Solution

The fourth proportional to 3,318.90, 4,971.86 and 1,561.62 is: 2,339.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,318.90 : 4,971.86 = 1,561.62 : x
  2. Step 2: Convert to fraction form
    3,318.90/4,971.86 = 1,561.62/x
  3. Step 3: Cross multiply
    3,318.90x = 4,971.86 × 1,561.62
  4. Step 4: Simplify right side
    3,318.90x = 7,764,156.01
  5. Step 5: Solve for x
    x = 7,764,156.01/3,318.90
  6. Step 6: Final answer
    x = 2,339.38

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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.