Home / 3,178.05-4,385.08-1,761.67

Finding the Fourth Proportional to 3,178.05, 4,385.08 and 1,761.67

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Solution

The fourth proportional to 3,178.05, 4,385.08 and 1,761.67 is: 2,430.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.05 : 4,385.08 = 1,761.67 : x
  2. Step 2: Convert to fraction form
    3,178.05/4,385.08 = 1,761.67/x
  3. Step 3: Cross multiply
    3,178.05x = 4,385.08 × 1,761.67
  4. Step 4: Simplify right side
    3,178.05x = 7,725,071.57
  5. Step 5: Solve for x
    x = 7,725,071.57/3,178.05
  6. Step 6: Final answer
    x = 2,430.76

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1.5x scale

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.