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Finding the Fourth Proportional to 570,481.28, 787,234.16 and 312,308.72

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Solution

The fourth proportional to 570,481.28, 787,234.16 and 312,308.72 is: 430,969.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,481.28 : 787,234.16 = 312,308.72 : x
  2. Step 2: Convert to fraction form
    570,481.28/787,234.16 = 312,308.72/x
  3. Step 3: Cross multiply
    570,481.28x = 787,234.16 × 312,308.72
  4. Step 4: Simplify right side
    570,481.28x = 245,860,092,849.88
  5. Step 5: Solve for x
    x = 245,860,092,849.88/570,481.28
  6. Step 6: Final answer
    x = 430,969.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.