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Finding the Fourth Proportional to 471,628.58, 649,405.95 and 355,510.73

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Solution

The fourth proportional to 471,628.58, 649,405.95 and 355,510.73 is: 489,518.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    471,628.58 : 649,405.95 = 355,510.73 : x
  2. Step 2: Convert to fraction form
    471,628.58/649,405.95 = 355,510.73/x
  3. Step 3: Cross multiply
    471,628.58x = 649,405.95 × 355,510.73
  4. Step 4: Simplify right side
    471,628.58x = 230,870,780,103.81
  5. Step 5: Solve for x
    x = 230,870,780,103.81/471,628.58
  6. Step 6: Final answer
    x = 489,518.22

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.