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Finding the Fourth Proportional to 654,313.20, 981,469.80 and 430,364.40

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Solution

The fourth proportional to 654,313.20, 981,469.80 and 430,364.40 is: 645,546.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,313.20 : 981,469.80 = 430,364.40 : x
  2. Step 2: Convert to fraction form
    654,313.20/981,469.80 = 430,364.40/x
  3. Step 3: Cross multiply
    654,313.20x = 981,469.80 × 430,364.40
  4. Step 4: Simplify right side
    654,313.20x = 422,389,661,595.12
  5. Step 5: Solve for x
    x = 422,389,661,595.12/654,313.20
  6. Step 6: Final answer
    x = 645,546.60

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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.