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Finding the Fourth Proportional to 458,323.31, 687,503.60 and 218,313.83

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Solution

The fourth proportional to 458,323.31, 687,503.60 and 218,313.83 is: 327,479.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,323.31 : 687,503.60 = 218,313.83 : x
  2. Step 2: Convert to fraction form
    458,323.31/687,503.60 = 218,313.83/x
  3. Step 3: Cross multiply
    458,323.31x = 687,503.60 × 218,313.83
  4. Step 4: Simplify right side
    458,323.31x = 150,091,545,500.66
  5. Step 5: Solve for x
    x = 150,091,545,500.66/458,323.31
  6. Step 6: Final answer
    x = 327,479.62

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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.