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Finding the Fourth Proportional to 691,714.89, 954,564.21 and 385,791.66

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Solution

The fourth proportional to 691,714.89, 954,564.21 and 385,791.66 is: 532,391.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,714.89 : 954,564.21 = 385,791.66 : x
  2. Step 2: Convert to fraction form
    691,714.89/954,564.21 = 385,791.66/x
  3. Step 3: Cross multiply
    691,714.89x = 954,564.21 × 385,791.66
  4. Step 4: Simplify right side
    691,714.89x = 368,262,911,152.49
  5. Step 5: Solve for x
    x = 368,262,911,152.49/691,714.89
  6. Step 6: Final answer
    x = 532,391.19

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.