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Finding the Fourth Proportional to 310,663.08, 428,198.22 and 219,902.58

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Solution

The fourth proportional to 310,663.08, 428,198.22 and 219,902.58 is: 303,099.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,663.08 : 428,198.22 = 219,902.58 : x
  2. Step 2: Convert to fraction form
    310,663.08/428,198.22 = 219,902.58/x
  3. Step 3: Cross multiply
    310,663.08x = 428,198.22 × 219,902.58
  4. Step 4: Simplify right side
    310,663.08x = 94,161,893,329.41
  5. Step 5: Solve for x
    x = 94,161,893,329.41/310,663.08
  6. Step 6: Final answer
    x = 303,099.72

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1.5x scale

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.