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Finding the Fourth Proportional to 307,956.80, 431,761.60 and 307,956.80

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Solution

The fourth proportional to 307,956.80, 431,761.60 and 307,956.80 is: 431,761.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,956.80 : 431,761.60 = 307,956.80 : x
  2. Step 2: Convert to fraction form
    307,956.80/431,761.60 = 307,956.80/x
  3. Step 3: Cross multiply
    307,956.80x = 431,761.60 × 307,956.80
  4. Step 4: Simplify right side
    307,956.80x = 132,963,920,698.88
  5. Step 5: Solve for x
    x = 132,963,920,698.88/307,956.80
  6. Step 6: Final answer
    x = 431,761.60

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.