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Finding the Fourth Proportional to 666,583.08, 999,978.78 and 217,199.72

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Solution

The fourth proportional to 666,583.08, 999,978.78 and 217,199.72 is: 325,833.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,583.08 : 999,978.78 = 217,199.72 : x
  2. Step 2: Convert to fraction form
    666,583.08/999,978.78 = 217,199.72/x
  3. Step 3: Cross multiply
    666,583.08x = 999,978.78 × 217,199.72
  4. Step 4: Simplify right side
    666,583.08x = 217,195,111,021.94
  5. Step 5: Solve for x
    x = 217,195,111,021.94/666,583.08
  6. Step 6: Final answer
    x = 325,833.52

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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.