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Finding the Fourth Proportional to 279,936.40, 419,904.60 and 155,520.40

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Solution

The fourth proportional to 279,936.40, 419,904.60 and 155,520.40 is: 233,280.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936.40 : 419,904.60 = 155,520.40 : x
  2. Step 2: Convert to fraction form
    279,936.40/419,904.60 = 155,520.40/x
  3. Step 3: Cross multiply
    279,936.40x = 419,904.60 × 155,520.40
  4. Step 4: Simplify right side
    279,936.40x = 65,303,731,353.84
  5. Step 5: Solve for x
    x = 65,303,731,353.84/279,936.40
  6. Step 6: Final answer
    x = 233,280.60

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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.