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Finding the Fourth Proportional to 643,514.70, 965,272.05 and 494,507.10

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Solution

The fourth proportional to 643,514.70, 965,272.05 and 494,507.10 is: 741,760.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,514.70 : 965,272.05 = 494,507.10 : x
  2. Step 2: Convert to fraction form
    643,514.70/965,272.05 = 494,507.10/x
  3. Step 3: Cross multiply
    643,514.70x = 965,272.05 × 494,507.10
  4. Step 4: Simplify right side
    643,514.70x = 477,333,882,156.56
  5. Step 5: Solve for x
    x = 477,333,882,156.56/643,514.70
  6. Step 6: Final answer
    x = 741,760.65

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Double scale
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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.