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Finding the Fourth Proportional to 654,490.80, 981,736.20 and 455,425.20

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Solution

The fourth proportional to 654,490.80, 981,736.20 and 455,425.20 is: 683,137.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,490.80 : 981,736.20 = 455,425.20 : x
  2. Step 2: Convert to fraction form
    654,490.80/981,736.20 = 455,425.20/x
  3. Step 3: Cross multiply
    654,490.80x = 981,736.20 × 455,425.20
  4. Step 4: Simplify right side
    654,490.80x = 447,107,405,232.24
  5. Step 5: Solve for x
    x = 447,107,405,232.24/654,490.80
  6. Step 6: Final answer
    x = 683,137.80

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Double scale
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Similar ratio
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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.