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Finding the Fourth Proportional to 458,350.10, 687,543.78 and 218,340.62

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Solution

The fourth proportional to 458,350.10, 687,543.78 and 218,340.62 is: 327,519.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,350.10 : 687,543.78 = 218,340.62 : x
  2. Step 2: Convert to fraction form
    458,350.10/687,543.78 = 218,340.62/x
  3. Step 3: Cross multiply
    458,350.10x = 687,543.78 × 218,340.62
  4. Step 4: Simplify right side
    458,350.10x = 150,118,735,202.34
  5. Step 5: Solve for x
    x = 150,118,735,202.34/458,350.10
  6. Step 6: Final answer
    x = 327,519.80

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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.