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Finding the Fourth Proportional to 386,025.60, 579,042.72 and 161,420.16

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Solution

The fourth proportional to 386,025.60, 579,042.72 and 161,420.16 is: 242,132.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,025.60 : 579,042.72 = 161,420.16 : x
  2. Step 2: Convert to fraction form
    386,025.60/579,042.72 = 161,420.16/x
  3. Step 3: Cross multiply
    386,025.60x = 579,042.72 × 161,420.16
  4. Step 4: Simplify right side
    386,025.60x = 93,469,168,509.24
  5. Step 5: Solve for x
    x = 93,469,168,509.24/386,025.60
  6. Step 6: Final answer
    x = 242,132.05

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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.