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Finding the Fourth Proportional to 275,816.80, 413,725.20 and 262,986.40

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Solution

The fourth proportional to 275,816.80, 413,725.20 and 262,986.40 is: 394,479.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,816.80 : 413,725.20 = 262,986.40 : x
  2. Step 2: Convert to fraction form
    275,816.80/413,725.20 = 262,986.40/x
  3. Step 3: Cross multiply
    275,816.80x = 413,725.20 × 262,986.40
  4. Step 4: Simplify right side
    275,816.80x = 108,804,100,937.28
  5. Step 5: Solve for x
    x = 108,804,100,937.28/275,816.80
  6. Step 6: Final answer
    x = 394,479.60

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1.5x scale

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.