Home / 3,190.40-4,401.80-1,931.92

Finding the Fourth Proportional to 3,190.40, 4,401.80 and 1,931.92

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Solution

The fourth proportional to 3,190.40, 4,401.80 and 1,931.92 is: 2,665.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,190.40 : 4,401.80 = 1,931.92 : x
  2. Step 2: Convert to fraction form
    3,190.40/4,401.80 = 1,931.92/x
  3. Step 3: Cross multiply
    3,190.40x = 4,401.80 × 1,931.92
  4. Step 4: Simplify right side
    3,190.40x = 8,503,925.46
  5. Step 5: Solve for x
    x = 8,503,925.46/3,190.40
  6. Step 6: Final answer
    x = 2,665.47

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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.