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Finding the Fourth Proportional to 520,683.28, 718,548.12 and 305,892.40

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Solution

The fourth proportional to 520,683.28, 718,548.12 and 305,892.40 is: 422,134.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,683.28 : 718,548.12 = 305,892.40 : x
  2. Step 2: Convert to fraction form
    520,683.28/718,548.12 = 305,892.40/x
  3. Step 3: Cross multiply
    520,683.28x = 718,548.12 × 305,892.40
  4. Step 4: Simplify right side
    520,683.28x = 219,798,408,942.29
  5. Step 5: Solve for x
    x = 219,798,408,942.29/520,683.28
  6. Step 6: Final answer
    x = 422,134.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.