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Finding the Fourth Proportional to 279,991.60, 419,987.40 and 168,017.20

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Solution

The fourth proportional to 279,991.60, 419,987.40 and 168,017.20 is: 252,025.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,991.60 : 419,987.40 = 168,017.20 : x
  2. Step 2: Convert to fraction form
    279,991.60/419,987.40 = 168,017.20/x
  3. Step 3: Cross multiply
    279,991.60x = 419,987.40 × 168,017.20
  4. Step 4: Simplify right side
    279,991.60x = 70,565,106,983.28
  5. Step 5: Solve for x
    x = 70,565,106,983.28/279,991.60
  6. Step 6: Final answer
    x = 252,025.80

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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.