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Finding the Fourth Proportional to 543,145.80, 813,843.90 and 453,916.20

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Solution

The fourth proportional to 543,145.80, 813,843.90 and 453,916.20 is: 680,143.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,145.80 : 813,843.90 = 453,916.20 : x
  2. Step 2: Convert to fraction form
    543,145.80/813,843.90 = 453,916.20/x
  3. Step 3: Cross multiply
    543,145.80x = 813,843.90 × 453,916.20
  4. Step 4: Simplify right side
    543,145.80x = 369,416,930,481.18
  5. Step 5: Solve for x
    x = 369,416,930,481.18/543,145.80
  6. Step 6: Final answer
    x = 680,143.21

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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.