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Finding the Fourth Proportional to 279,940.90, 419,911.35 and 153,532.30

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Solution

The fourth proportional to 279,940.90, 419,911.35 and 153,532.30 is: 230,298.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,940.90 : 419,911.35 = 153,532.30 : x
  2. Step 2: Convert to fraction form
    279,940.90/419,911.35 = 153,532.30/x
  3. Step 3: Cross multiply
    279,940.90x = 419,911.35 × 153,532.30
  4. Step 4: Simplify right side
    279,940.90x = 64,469,955,361.61
  5. Step 5: Solve for x
    x = 64,469,955,361.61/279,940.90
  6. Step 6: Final answer
    x = 230,298.45

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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.