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Finding the Fourth Proportional to 666,876.34, 999,811.50 and 217,328.86

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Solution

The fourth proportional to 666,876.34, 999,811.50 and 217,328.86 is: 325,829.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,876.34 : 999,811.50 = 217,328.86 : x
  2. Step 2: Convert to fraction form
    666,876.34/999,811.50 = 217,328.86/x
  3. Step 3: Cross multiply
    666,876.34x = 999,811.50 × 217,328.86
  4. Step 4: Simplify right side
    666,876.34x = 217,287,893,509.89
  5. Step 5: Solve for x
    x = 217,287,893,509.89/666,876.34
  6. Step 6: Final answer
    x = 325,829.36

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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.