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Finding the Fourth Proportional to 543,138.30, 813,832.65 and 453,908.70

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Solution

The fourth proportional to 543,138.30, 813,832.65 and 453,908.70 is: 680,131.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,138.30 : 813,832.65 = 453,908.70 : x
  2. Step 2: Convert to fraction form
    543,138.30/813,832.65 = 453,908.70/x
  3. Step 3: Cross multiply
    543,138.30x = 813,832.65 × 453,908.70
  4. Step 4: Simplify right side
    543,138.30x = 369,405,720,179.06
  5. Step 5: Solve for x
    x = 369,405,720,179.06/543,138.30
  6. Step 6: Final answer
    x = 680,131.97

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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.