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Finding the Fourth Proportional to 478,728.70, 718,093.05 and 279,274.30

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Solution

The fourth proportional to 478,728.70, 718,093.05 and 279,274.30 is: 418,911.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,728.70 : 718,093.05 = 279,274.30 : x
  2. Step 2: Convert to fraction form
    478,728.70/718,093.05 = 279,274.30/x
  3. Step 3: Cross multiply
    478,728.70x = 718,093.05 × 279,274.30
  4. Step 4: Simplify right side
    478,728.70x = 200,544,933,873.62
  5. Step 5: Solve for x
    x = 200,544,933,873.62/478,728.70
  6. Step 6: Final answer
    x = 418,911.45

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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.