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Finding the Fourth Proportional to 484,438.40, 726,139.20 and 218,153.60

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Solution

The fourth proportional to 484,438.40, 726,139.20 and 218,153.60 is: 326,996.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    484,438.40 : 726,139.20 = 218,153.60 : x
  2. Step 2: Convert to fraction form
    484,438.40/726,139.20 = 218,153.60/x
  3. Step 3: Cross multiply
    484,438.40x = 726,139.20 × 218,153.60
  4. Step 4: Simplify right side
    484,438.40x = 158,409,880,581.12
  5. Step 5: Solve for x
    x = 158,409,880,581.12/484,438.40
  6. Step 6: Final answer
    x = 326,996.95

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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.