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Finding the Fourth Proportional to 386,466.80, 579,700.20 and 162,080.60

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Solution

The fourth proportional to 386,466.80, 579,700.20 and 162,080.60 is: 243,120.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,466.80 : 579,700.20 = 162,080.60 : x
  2. Step 2: Convert to fraction form
    386,466.80/579,700.20 = 162,080.60/x
  3. Step 3: Cross multiply
    386,466.80x = 579,700.20 × 162,080.60
  4. Step 4: Simplify right side
    386,466.80x = 93,958,156,236.12
  5. Step 5: Solve for x
    x = 93,958,156,236.12/386,466.80
  6. Step 6: Final answer
    x = 243,120.90

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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.