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Finding the Fourth Proportional to 721,427.01, 995,481.75 and 415,602.39

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Solution

The fourth proportional to 721,427.01, 995,481.75 and 415,602.39 is: 573,480.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    721,427.01 : 995,481.75 = 415,602.39 : x
  2. Step 2: Convert to fraction form
    721,427.01/995,481.75 = 415,602.39/x
  3. Step 3: Cross multiply
    721,427.01x = 995,481.75 × 415,602.39
  4. Step 4: Simplify right side
    721,427.01x = 413,724,597,455.19
  5. Step 5: Solve for x
    x = 413,724,597,455.19/721,427.01
  6. Step 6: Final answer
    x = 573,480.88

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.