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Finding the Fourth Proportional to 714,998.90, 986,706.58 and 392,716.50

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Solution

The fourth proportional to 714,998.90, 986,706.58 and 392,716.50 is: 541,953.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,998.90 : 986,706.58 = 392,716.50 : x
  2. Step 2: Convert to fraction form
    714,998.90/986,706.58 = 392,716.50/x
  3. Step 3: Cross multiply
    714,998.90x = 986,706.58 × 392,716.50
  4. Step 4: Simplify right side
    714,998.90x = 387,495,954,624.57
  5. Step 5: Solve for x
    x = 387,495,954,624.57/714,998.90
  6. Step 6: Final answer
    x = 541,953.22

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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.