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Finding the Fourth Proportional to 406,879.20, 610,318.80 and 265,161.60

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Solution

The fourth proportional to 406,879.20, 610,318.80 and 265,161.60 is: 397,742.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    406,879.20 : 610,318.80 = 265,161.60 : x
  2. Step 2: Convert to fraction form
    406,879.20/610,318.80 = 265,161.60/x
  3. Step 3: Cross multiply
    406,879.20x = 610,318.80 × 265,161.60
  4. Step 4: Simplify right side
    406,879.20x = 161,833,109,518.08
  5. Step 5: Solve for x
    x = 161,833,109,518.08/406,879.20
  6. Step 6: Final answer
    x = 397,742.40

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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.