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Finding the Fourth Proportional to 654,663.60, 981,995.40 and 211,431.60

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Solution

The fourth proportional to 654,663.60, 981,995.40 and 211,431.60 is: 317,147.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,663.60 : 981,995.40 = 211,431.60 : x
  2. Step 2: Convert to fraction form
    654,663.60/981,995.40 = 211,431.60/x
  3. Step 3: Cross multiply
    654,663.60x = 981,995.40 × 211,431.60
  4. Step 4: Simplify right side
    654,663.60x = 207,624,858,614.64
  5. Step 5: Solve for x
    x = 207,624,858,614.64/654,663.60
  6. Step 6: Final answer
    x = 317,147.40

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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.