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Finding the Fourth Proportional to 666,578.32, 999,971.16 and 217,194.64

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Solution

The fourth proportional to 666,578.32, 999,971.16 and 217,194.64 is: 325,825.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,578.32 : 999,971.16 = 217,194.64 : x
  2. Step 2: Convert to fraction form
    666,578.32/999,971.16 = 217,194.64/x
  3. Step 3: Cross multiply
    666,578.32x = 999,971.16 × 217,194.64
  4. Step 4: Simplify right side
    666,578.32x = 217,188,376,106.58
  5. Step 5: Solve for x
    x = 217,188,376,106.58/666,578.32
  6. Step 6: Final answer
    x = 325,825.74

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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.