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Finding the Fourth Proportional to 663,308.80, 995,104.88 and 214,055.20

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Solution

The fourth proportional to 663,308.80, 995,104.88 and 214,055.20 is: 321,128.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,308.80 : 995,104.88 = 214,055.20 : x
  2. Step 2: Convert to fraction form
    663,308.80/995,104.88 = 214,055.20/x
  3. Step 3: Cross multiply
    663,308.80x = 995,104.88 × 214,055.20
  4. Step 4: Simplify right side
    663,308.80x = 213,007,374,109.38
  5. Step 5: Solve for x
    x = 213,007,374,109.38/663,308.80
  6. Step 6: Final answer
    x = 321,128.52

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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.