Home / 3,161.84-4,742.78-1,312.92

Finding the Fourth Proportional to 3,161.84, 4,742.78 and 1,312.92

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Solution

The fourth proportional to 3,161.84, 4,742.78 and 1,312.92 is: 1,969.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,161.84 : 4,742.78 = 1,312.92 : x
  2. Step 2: Convert to fraction form
    3,161.84/4,742.78 = 1,312.92/x
  3. Step 3: Cross multiply
    3,161.84x = 4,742.78 × 1,312.92
  4. Step 4: Simplify right side
    3,161.84x = 6,226,890.72
  5. Step 5: Solve for x
    x = 6,226,890.72/3,161.84
  6. Step 6: Final answer
    x = 1,969.39

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1.5x scale

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.