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Finding the Fourth Proportional to 538,163.20, 805,689.60 and 328,211.20

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Solution

The fourth proportional to 538,163.20, 805,689.60 and 328,211.20 is: 491,368.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,163.20 : 805,689.60 = 328,211.20 : x
  2. Step 2: Convert to fraction form
    538,163.20/805,689.60 = 328,211.20/x
  3. Step 3: Cross multiply
    538,163.20x = 805,689.60 × 328,211.20
  4. Step 4: Simplify right side
    538,163.20x = 264,436,350,443.52
  5. Step 5: Solve for x
    x = 264,436,350,443.52/538,163.20
  6. Step 6: Final answer
    x = 491,368.33

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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.