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Finding the Fourth Proportional to 323,387.87, 443,043.51 and 311,266.94

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Solution

The fourth proportional to 323,387.87, 443,043.51 and 311,266.94 is: 426,437.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,387.87 : 443,043.51 = 311,266.94 : x
  2. Step 2: Convert to fraction form
    323,387.87/443,043.51 = 311,266.94/x
  3. Step 3: Cross multiply
    323,387.87x = 443,043.51 × 311,266.94
  4. Step 4: Simplify right side
    323,387.87x = 137,904,795,429.34
  5. Step 5: Solve for x
    x = 137,904,795,429.34/323,387.87
  6. Step 6: Final answer
    x = 426,437.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.