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Finding the Fourth Proportional to 483,674.76, 725,511.20 and 128,688.77

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Solution

The fourth proportional to 483,674.76, 725,511.20 and 128,688.77 is: 193,032.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,674.76 : 725,511.20 = 128,688.77 : x
  2. Step 2: Convert to fraction form
    483,674.76/725,511.20 = 128,688.77/x
  3. Step 3: Cross multiply
    483,674.76x = 725,511.20 × 128,688.77
  4. Step 4: Simplify right side
    483,674.76x = 93,365,143,949.22
  5. Step 5: Solve for x
    x = 93,365,143,949.22/483,674.76
  6. Step 6: Final answer
    x = 193,032.90

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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.