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Finding the Fourth Proportional to 386,145.60, 578,757.60 and 161,505.60

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Solution

The fourth proportional to 386,145.60, 578,757.60 and 161,505.60 is: 242,065.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,145.60 : 578,757.60 = 161,505.60 : x
  2. Step 2: Convert to fraction form
    386,145.60/578,757.60 = 161,505.60/x
  3. Step 3: Cross multiply
    386,145.60x = 578,757.60 × 161,505.60
  4. Step 4: Simplify right side
    386,145.60x = 93,472,593,442.56
  5. Step 5: Solve for x
    x = 93,472,593,442.56/386,145.60
  6. Step 6: Final answer
    x = 242,065.67

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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.