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Finding the Fourth Proportional to 392,443.60, 587,790.60 and 322,459.60

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Solution

The fourth proportional to 392,443.60, 587,790.60 and 322,459.60 is: 482,970.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,443.60 : 587,790.60 = 322,459.60 : x
  2. Step 2: Convert to fraction form
    392,443.60/587,790.60 = 322,459.60/x
  3. Step 3: Cross multiply
    392,443.60x = 587,790.60 × 322,459.60
  4. Step 4: Simplify right side
    392,443.60x = 189,538,721,759.76
  5. Step 5: Solve for x
    x = 189,538,721,759.76/392,443.60
  6. Step 6: Final answer
    x = 482,970.60

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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.