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Finding the Fourth Proportional to 654,663.60, 981,995.40 and 281,415.60

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Solution

The fourth proportional to 654,663.60, 981,995.40 and 281,415.60 is: 422,123.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,663.60 : 981,995.40 = 281,415.60 : x
  2. Step 2: Convert to fraction form
    654,663.60/981,995.40 = 281,415.60/x
  3. Step 3: Cross multiply
    654,663.60x = 981,995.40 × 281,415.60
  4. Step 4: Simplify right side
    654,663.60x = 276,348,824,688.24
  5. Step 5: Solve for x
    x = 276,348,824,688.24/654,663.60
  6. Step 6: Final answer
    x = 422,123.40

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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.