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Finding the Fourth Proportional to 432,042.80, 647,977.80 and 207,402.80

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Solution

The fourth proportional to 432,042.80, 647,977.80 and 207,402.80 is: 311,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,042.80 : 647,977.80 = 207,402.80 : x
  2. Step 2: Convert to fraction form
    432,042.80/647,977.80 = 207,402.80/x
  3. Step 3: Cross multiply
    432,042.80x = 647,977.80 × 207,402.80
  4. Step 4: Simplify right side
    432,042.80x = 134,392,410,057.84
  5. Step 5: Solve for x
    x = 134,392,410,057.84/432,042.80
  6. Step 6: Final answer
    x = 311,062.72

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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.