Home / 432,481.20-648,138.60-289,921.20

Finding the Fourth Proportional to 432,481.20, 648,138.60 and 289,921.20

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Solution

The fourth proportional to 432,481.20, 648,138.60 and 289,921.20 is: 434,490.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,481.20 : 648,138.60 = 289,921.20 : x
  2. Step 2: Convert to fraction form
    432,481.20/648,138.60 = 289,921.20/x
  3. Step 3: Cross multiply
    432,481.20x = 648,138.60 × 289,921.20
  4. Step 4: Simplify right side
    432,481.20x = 187,909,120,678.32
  5. Step 5: Solve for x
    x = 187,909,120,678.32/432,481.20
  6. Step 6: Final answer
    x = 434,490.84

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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.