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Finding the Fourth Proportional to 393,087.44, 589,320.12 and 392,603.60

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Solution

The fourth proportional to 393,087.44, 589,320.12 and 392,603.60 is: 588,594.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,087.44 : 589,320.12 = 392,603.60 : x
  2. Step 2: Convert to fraction form
    393,087.44/589,320.12 = 392,603.60/x
  3. Step 3: Cross multiply
    393,087.44x = 589,320.12 × 392,603.60
  4. Step 4: Simplify right side
    393,087.44x = 231,369,200,664.43
  5. Step 5: Solve for x
    x = 231,369,200,664.43/393,087.44
  6. Step 6: Final answer
    x = 588,594.74

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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.