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Finding the Fourth Proportional to 667,561.12, 1,001,403.12 and 218,284.32

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Solution

The fourth proportional to 667,561.12, 1,001,403.12 and 218,284.32 is: 327,446.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,561.12 : 1,001,403.12 = 218,284.32 : x
  2. Step 2: Convert to fraction form
    667,561.12/1,001,403.12 = 218,284.32/x
  3. Step 3: Cross multiply
    667,561.12x = 1,001,403.12 × 218,284.32
  4. Step 4: Simplify right side
    667,561.12x = 218,590,599,095.08
  5. Step 5: Solve for x
    x = 218,590,599,095.08/667,561.12
  6. Step 6: Final answer
    x = 327,446.57

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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.