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Finding the Fourth Proportional to 298,719,807.20, 448,079,710.80 and 262,887,999.20

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Solution

The fourth proportional to 298,719,807.20, 448,079,710.80 and 262,887,999.20 is: 394,331,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,719,807.20 : 448,079,710.80 = 262,887,999.20 : x
  2. Step 2: Convert to fraction form
    298,719,807.20/448,079,710.80 = 262,887,999.20/x
  3. Step 3: Cross multiply
    298,719,807.20x = 448,079,710.80 × 262,887,999.20
  4. Step 4: Simplify right side
    298,719,807.20x = 117,794,778,654,326,624
  5. Step 5: Solve for x
    x = 117,794,778,654,326,624/298,719,807.20
  6. Step 6: Final answer
    x = 394,331,998.80

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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.