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Finding the Fourth Proportional to 814,504.80, 1,221,872.40 and 253,480.80

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Solution

The fourth proportional to 814,504.80, 1,221,872.40 and 253,480.80 is: 380,257.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    814,504.80 : 1,221,872.40 = 253,480.80 : x
  2. Step 2: Convert to fraction form
    814,504.80/1,221,872.40 = 253,480.80/x
  3. Step 3: Cross multiply
    814,504.80x = 1,221,872.40 × 253,480.80
  4. Step 4: Simplify right side
    814,504.80x = 309,721,193,449.92
  5. Step 5: Solve for x
    x = 309,721,193,449.92/814,504.80
  6. Step 6: Final answer
    x = 380,257.05

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1.5x scale

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.