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Finding the Fourth Proportional to 393,730.80, 591,033.60 and 216,583.80

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Solution

The fourth proportional to 393,730.80, 591,033.60 and 216,583.80 is: 325,116.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,730.80 : 591,033.60 = 216,583.80 : x
  2. Step 2: Convert to fraction form
    393,730.80/591,033.60 = 216,583.80/x
  3. Step 3: Cross multiply
    393,730.80x = 591,033.60 × 216,583.80
  4. Step 4: Simplify right side
    393,730.80x = 128,008,303,015.68
  5. Step 5: Solve for x
    x = 128,008,303,015.68/393,730.80
  6. Step 6: Final answer
    x = 325,116.31

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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.