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Finding the Fourth Proportional to 279,968.90, 419,953.35 and 274,136.90

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Solution

The fourth proportional to 279,968.90, 419,953.35 and 274,136.90 is: 411,205.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,968.90 : 419,953.35 = 274,136.90 : x
  2. Step 2: Convert to fraction form
    279,968.90/419,953.35 = 274,136.90/x
  3. Step 3: Cross multiply
    279,968.90x = 419,953.35 × 274,136.90
  4. Step 4: Simplify right side
    279,968.90x = 115,124,709,513.62
  5. Step 5: Solve for x
    x = 115,124,709,513.62/279,968.90
  6. Step 6: Final answer
    x = 411,205.35

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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.