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Finding the Fourth Proportional to 752,751.60, 1,128,205.80 and 331,580.40

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Solution

The fourth proportional to 752,751.60, 1,128,205.80 and 331,580.40 is: 496,964.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    752,751.60 : 1,128,205.80 = 331,580.40 : x
  2. Step 2: Convert to fraction form
    752,751.60/1,128,205.80 = 331,580.40/x
  3. Step 3: Cross multiply
    752,751.60x = 1,128,205.80 × 331,580.40
  4. Step 4: Simplify right side
    752,751.60x = 374,090,930,446.32
  5. Step 5: Solve for x
    x = 374,090,930,446.32/752,751.60
  6. Step 6: Final answer
    x = 496,964.64

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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.