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Finding the Fourth Proportional to 491,437.48, 678,392.96 and 330,385.94

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Solution

The fourth proportional to 491,437.48, 678,392.96 and 330,385.94 is: 456,073.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,437.48 : 678,392.96 = 330,385.94 : x
  2. Step 2: Convert to fraction form
    491,437.48/678,392.96 = 330,385.94/x
  3. Step 3: Cross multiply
    491,437.48x = 678,392.96 × 330,385.94
  4. Step 4: Simplify right side
    491,437.48x = 224,131,495,778.98
  5. Step 5: Solve for x
    x = 224,131,495,778.98/491,437.48
  6. Step 6: Final answer
    x = 456,073.27

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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.