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Finding the Fourth Proportional to 520,695, 718,353.72 and 326,988.78

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Solution

The fourth proportional to 520,695, 718,353.72 and 326,988.78 is: 451,115.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,695 : 718,353.72 = 326,988.78 : x
  2. Step 2: Convert to fraction form
    520,695/718,353.72 = 326,988.78/x
  3. Step 3: Cross multiply
    520,695x = 718,353.72 × 326,988.78
  4. Step 4: Simplify right side
    520,695x = 234,893,606,511.26
  5. Step 5: Solve for x
    x = 234,893,606,511.26/520,695
  6. Step 6: Final answer
    x = 451,115.54

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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.