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Finding the Fourth Proportional to 491,288.40, 737,321.40 and 191,912.40

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Solution

The fourth proportional to 491,288.40, 737,321.40 and 191,912.40 is: 288,020.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,288.40 : 737,321.40 = 191,912.40 : x
  2. Step 2: Convert to fraction form
    491,288.40/737,321.40 = 191,912.40/x
  3. Step 3: Cross multiply
    491,288.40x = 737,321.40 × 191,912.40
  4. Step 4: Simplify right side
    491,288.40x = 141,501,119,445.36
  5. Step 5: Solve for x
    x = 141,501,119,445.36/491,288.40
  6. Step 6: Final answer
    x = 288,020.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.