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Finding the Fourth Proportional to 639,383.80, 882,286.79 and 352,885.42

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Solution

The fourth proportional to 639,383.80, 882,286.79 and 352,885.42 is: 486,947.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,383.80 : 882,286.79 = 352,885.42 : x
  2. Step 2: Convert to fraction form
    639,383.80/882,286.79 = 352,885.42/x
  3. Step 3: Cross multiply
    639,383.80x = 882,286.79 × 352,885.42
  4. Step 4: Simplify right side
    639,383.80x = 311,346,144,449.60
  5. Step 5: Solve for x
    x = 311,346,144,449.60/639,383.80
  6. Step 6: Final answer
    x = 486,947.19

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.