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Finding the Fourth Proportional to 643,579.20, 965,368.80 and 494,571.60

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Solution

The fourth proportional to 643,579.20, 965,368.80 and 494,571.60 is: 741,857.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,579.20 : 965,368.80 = 494,571.60 : x
  2. Step 2: Convert to fraction form
    643,579.20/965,368.80 = 494,571.60/x
  3. Step 3: Cross multiply
    643,579.20x = 965,368.80 × 494,571.60
  4. Step 4: Simplify right side
    643,579.20x = 477,443,992,006.08
  5. Step 5: Solve for x
    x = 477,443,992,006.08/643,579.20
  6. Step 6: Final answer
    x = 741,857.40

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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.