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Finding the Fourth Proportional to 612,680.80, 919,021.20 and 297,752.80

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Solution

The fourth proportional to 612,680.80, 919,021.20 and 297,752.80 is: 446,629.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,680.80 : 919,021.20 = 297,752.80 : x
  2. Step 2: Convert to fraction form
    612,680.80/919,021.20 = 297,752.80/x
  3. Step 3: Cross multiply
    612,680.80x = 919,021.20 × 297,752.80
  4. Step 4: Simplify right side
    612,680.80x = 273,641,135,559.36
  5. Step 5: Solve for x
    x = 273,641,135,559.36/612,680.80
  6. Step 6: Final answer
    x = 446,629.20

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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.