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Finding the Fourth Proportional to 419,322.80, 628,984.20 and 279,354.80

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Solution

The fourth proportional to 419,322.80, 628,984.20 and 279,354.80 is: 419,032.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,322.80 : 628,984.20 = 279,354.80 : x
  2. Step 2: Convert to fraction form
    419,322.80/628,984.20 = 279,354.80/x
  3. Step 3: Cross multiply
    419,322.80x = 628,984.20 × 279,354.80
  4. Step 4: Simplify right side
    419,322.80x = 175,709,755,394.16
  5. Step 5: Solve for x
    x = 175,709,755,394.16/419,322.80
  6. Step 6: Final answer
    x = 419,032.20

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Similar ratio
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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.