Home / 4,782.80-7,174.20-1,320.06

Finding the Fourth Proportional to 4,782.80, 7,174.20 and 1,320.06

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Solution

The fourth proportional to 4,782.80, 7,174.20 and 1,320.06 is: 1,980.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,782.80 : 7,174.20 = 1,320.06 : x
  2. Step 2: Convert to fraction form
    4,782.80/7,174.20 = 1,320.06/x
  3. Step 3: Cross multiply
    4,782.80x = 7,174.20 × 1,320.06
  4. Step 4: Simplify right side
    4,782.80x = 9,470,374.45
  5. Step 5: Solve for x
    x = 9,470,374.45/4,782.80
  6. Step 6: Final answer
    x = 1,980.09

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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.