Home / 814,980.80-1,220,138.40-721,668.80

Finding the Fourth Proportional to 814,980.80, 1,220,138.40 and 721,668.80

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Solution

The fourth proportional to 814,980.80, 1,220,138.40 and 721,668.80 is: 1,080,437.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,980.80 : 1,220,138.40 = 721,668.80 : x
  2. Step 2: Convert to fraction form
    814,980.80/1,220,138.40 = 721,668.80/x
  3. Step 3: Cross multiply
    814,980.80x = 1,220,138.40 × 721,668.80
  4. Step 4: Simplify right side
    814,980.80x = 880,535,814,961.92
  5. Step 5: Solve for x
    x = 880,535,814,961.92/814,980.80
  6. Step 6: Final answer
    x = 1,080,437.50

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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.