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Finding the Fourth Proportional to 485,467.98, 669,671.47 and 303,864.63

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Solution

The fourth proportional to 485,467.98, 669,671.47 and 303,864.63 is: 419,161.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,467.98 : 669,671.47 = 303,864.63 : x
  2. Step 2: Convert to fraction form
    485,467.98/669,671.47 = 303,864.63/x
  3. Step 3: Cross multiply
    485,467.98x = 669,671.47 × 303,864.63
  4. Step 4: Simplify right side
    485,467.98x = 203,489,473,118.01
  5. Step 5: Solve for x
    x = 203,489,473,118.01/485,467.98
  6. Step 6: Final answer
    x = 419,161.47

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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.