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Finding the Fourth Proportional to 479,672.70, 719,509.05 and 280,218.30

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Solution

The fourth proportional to 479,672.70, 719,509.05 and 280,218.30 is: 420,327.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,672.70 : 719,509.05 = 280,218.30 : x
  2. Step 2: Convert to fraction form
    479,672.70/719,509.05 = 280,218.30/x
  3. Step 3: Cross multiply
    479,672.70x = 719,509.05 × 280,218.30
  4. Step 4: Simplify right side
    479,672.70x = 201,619,602,825.62
  5. Step 5: Solve for x
    x = 201,619,602,825.62/479,672.70
  6. Step 6: Final answer
    x = 420,327.45

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Similar ratio
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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.