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Finding the Fourth Proportional to 485,790.53, 728,707.68 and 148,806.62

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Solution

The fourth proportional to 485,790.53, 728,707.68 and 148,806.62 is: 223,216.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,790.53 : 728,707.68 = 148,806.62 : x
  2. Step 2: Convert to fraction form
    485,790.53/728,707.68 = 148,806.62/x
  3. Step 3: Cross multiply
    485,790.53x = 728,707.68 × 148,806.62
  4. Step 4: Simplify right side
    485,790.53x = 108,436,526,828.84
  5. Step 5: Solve for x
    x = 108,436,526,828.84/485,790.53
  6. Step 6: Final answer
    x = 223,216.63

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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.