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Finding the Fourth Proportional to 663,090.60, 993,979.80 and 325,855.20

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Solution

The fourth proportional to 663,090.60, 993,979.80 and 325,855.20 is: 488,460.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,090.60 : 993,979.80 = 325,855.20 : x
  2. Step 2: Convert to fraction form
    663,090.60/993,979.80 = 325,855.20/x
  3. Step 3: Cross multiply
    663,090.60x = 993,979.80 × 325,855.20
  4. Step 4: Simplify right side
    663,090.60x = 323,893,486,524.96
  5. Step 5: Solve for x
    x = 323,893,486,524.96/663,090.60
  6. Step 6: Final answer
    x = 488,460.38

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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.