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Finding the Fourth Proportional to 323,378.25, 443,030.28 and 311,257.35

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Solution

The fourth proportional to 323,378.25, 443,030.28 and 311,257.35 is: 426,424.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,378.25 : 443,030.28 = 311,257.35 : x
  2. Step 2: Convert to fraction form
    323,378.25/443,030.28 = 311,257.35/x
  3. Step 3: Cross multiply
    323,378.25x = 443,030.28 × 311,257.35
  4. Step 4: Simplify right side
    323,378.25x = 137,896,430,922.56
  5. Step 5: Solve for x
    x = 137,896,430,922.56/323,378.25
  6. Step 6: Final answer
    x = 426,424.57

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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.