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Finding the Fourth Proportional to 622,890,719.20, 934,336,078.80 and 300,404,447.20

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Solution

The fourth proportional to 622,890,719.20, 934,336,078.80 and 300,404,447.20 is: 450,606,670.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,890,719.20 : 934,336,078.80 = 300,404,447.20 : x
  2. Step 2: Convert to fraction form
    622,890,719.20/934,336,078.80 = 300,404,447.20/x
  3. Step 3: Cross multiply
    622,890,719.20x = 934,336,078.80 × 300,404,447.20
  4. Step 4: Simplify right side
    622,890,719.20x = 280,678,713,250,929,600
  5. Step 5: Solve for x
    x = 280,678,713,250,929,600/622,890,719.20
  6. Step 6: Final answer
    x = 450,606,670.80

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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.