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Finding the Fourth Proportional to 279,708.80, 419,563.20 and 275,561.60

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Solution

The fourth proportional to 279,708.80, 419,563.20 and 275,561.60 is: 413,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,708.80 : 419,563.20 = 275,561.60 : x
  2. Step 2: Convert to fraction form
    279,708.80/419,563.20 = 275,561.60/x
  3. Step 3: Cross multiply
    279,708.80x = 419,563.20 × 275,561.60
  4. Step 4: Simplify right side
    279,708.80x = 115,615,506,693.12
  5. Step 5: Solve for x
    x = 115,615,506,693.12/279,708.80
  6. Step 6: Final answer
    x = 413,342.40

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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.