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Finding the Fourth Proportional to 303,328.80, 454,993.20 and 81,712.80

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Solution

The fourth proportional to 303,328.80, 454,993.20 and 81,712.80 is: 122,569.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,328.80 : 454,993.20 = 81,712.80 : x
  2. Step 2: Convert to fraction form
    303,328.80/454,993.20 = 81,712.80/x
  3. Step 3: Cross multiply
    303,328.80x = 454,993.20 × 81,712.80
  4. Step 4: Simplify right side
    303,328.80x = 37,178,768,352.96
  5. Step 5: Solve for x
    x = 37,178,768,352.96/303,328.80
  6. Step 6: Final answer
    x = 122,569.20

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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.