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Finding the Fourth Proportional to 675,049.36, 931,540.20 and 388,579.60

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Solution

The fourth proportional to 675,049.36, 931,540.20 and 388,579.60 is: 536,223.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,049.36 : 931,540.20 = 388,579.60 : x
  2. Step 2: Convert to fraction form
    675,049.36/931,540.20 = 388,579.60/x
  3. Step 3: Cross multiply
    675,049.36x = 931,540.20 × 388,579.60
  4. Step 4: Simplify right side
    675,049.36x = 361,977,518,299.92
  5. Step 5: Solve for x
    x = 361,977,518,299.92/675,049.36
  6. Step 6: Final answer
    x = 536,223.78

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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.