Home / 3,120.86-4,677.39-1,561.31

Finding the Fourth Proportional to 3,120.86, 4,677.39 and 1,561.31

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Solution

The fourth proportional to 3,120.86, 4,677.39 and 1,561.31 is: 2,340.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,120.86 : 4,677.39 = 1,561.31 : x
  2. Step 2: Convert to fraction form
    3,120.86/4,677.39 = 1,561.31/x
  3. Step 3: Cross multiply
    3,120.86x = 4,677.39 × 1,561.31
  4. Step 4: Simplify right side
    3,120.86x = 7,302,855.78
  5. Step 5: Solve for x
    x = 7,302,855.78/3,120.86
  6. Step 6: Final answer
    x = 2,340.01

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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.