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Finding the Fourth Proportional to 388,374.09, 582,787.70 and 163,720.89

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Solution

The fourth proportional to 388,374.09, 582,787.70 and 163,720.89 is: 245,676.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,374.09 : 582,787.70 = 163,720.89 : x
  2. Step 2: Convert to fraction form
    388,374.09/582,787.70 = 163,720.89/x
  3. Step 3: Cross multiply
    388,374.09x = 582,787.70 × 163,720.89
  4. Step 4: Simplify right side
    388,374.09x = 95,414,520,106.45
  5. Step 5: Solve for x
    x = 95,414,520,106.45/388,374.09
  6. Step 6: Final answer
    x = 245,676.84

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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.