Home / 4,906.80-7,355.40-1,981.20

Finding the Fourth Proportional to 4,906.80, 7,355.40 and 1,981.20

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Solution

The fourth proportional to 4,906.80, 7,355.40 and 1,981.20 is: 2,969.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,906.80 : 7,355.40 = 1,981.20 : x
  2. Step 2: Convert to fraction form
    4,906.80/7,355.40 = 1,981.20/x
  3. Step 3: Cross multiply
    4,906.80x = 7,355.40 × 1,981.20
  4. Step 4: Simplify right side
    4,906.80x = 14,572,518.48
  5. Step 5: Solve for x
    x = 14,572,518.48/4,906.80
  6. Step 6: Final answer
    x = 2,969.86

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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.