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Finding the Fourth Proportional to 485,790.03, 728,706.93 and 148,806.12

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Solution

The fourth proportional to 485,790.03, 728,706.93 and 148,806.12 is: 223,215.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,790.03 : 728,706.93 = 148,806.12 : x
  2. Step 2: Convert to fraction form
    485,790.03/728,706.93 = 148,806.12/x
  3. Step 3: Cross multiply
    485,790.03x = 728,706.93 × 148,806.12
  4. Step 4: Simplify right side
    485,790.03x = 108,436,050,870.41
  5. Step 5: Solve for x
    x = 108,436,050,870.41/485,790.03
  6. Step 6: Final answer
    x = 223,215.88

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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.