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Finding the Fourth Proportional to 386,970.36, 580,679.64 and 162,310.80

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Solution

The fourth proportional to 386,970.36, 580,679.64 and 162,310.80 is: 243,560.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,970.36 : 580,679.64 = 162,310.80 : x
  2. Step 2: Convert to fraction form
    386,970.36/580,679.64 = 162,310.80/x
  3. Step 3: Cross multiply
    386,970.36x = 580,679.64 × 162,310.80
  4. Step 4: Simplify right side
    386,970.36x = 94,250,576,912.11
  5. Step 5: Solve for x
    x = 94,250,576,912.11/386,970.36
  6. Step 6: Final answer
    x = 243,560.20

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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.