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Finding the Fourth Proportional to 542,813.20, 813,636.60 and 205,723.60

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Solution

The fourth proportional to 542,813.20, 813,636.60 and 205,723.60 is: 308,364.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    542,813.20 : 813,636.60 = 205,723.60 : x
  2. Step 2: Convert to fraction form
    542,813.20/813,636.60 = 205,723.60/x
  3. Step 3: Cross multiply
    542,813.20x = 813,636.60 × 205,723.60
  4. Step 4: Simplify right side
    542,813.20x = 167,384,250,443.76
  5. Step 5: Solve for x
    x = 167,384,250,443.76/542,813.20
  6. Step 6: Final answer
    x = 308,364.37

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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.