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Finding the Fourth Proportional to 295,246,991.20, 442,870,486.80 and 218,719,487.20

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Solution

The fourth proportional to 295,246,991.20, 442,870,486.80 and 218,719,487.20 is: 328,079,230.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    295,246,991.20 : 442,870,486.80 = 218,719,487.20 : x
  2. Step 2: Convert to fraction form
    295,246,991.20/442,870,486.80 = 218,719,487.20/x
  3. Step 3: Cross multiply
    295,246,991.20x = 442,870,486.80 × 218,719,487.20
  4. Step 4: Simplify right side
    295,246,991.20x = 96,864,405,768,910,368
  5. Step 5: Solve for x
    x = 96,864,405,768,910,368/295,246,991.20
  6. Step 6: Final answer
    x = 328,079,230.80

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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.