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Finding the Fourth Proportional to 714,515.67, 986,027.72 and 392,231.25

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Solution

The fourth proportional to 714,515.67, 986,027.72 and 392,231.25 is: 541,276.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,515.67 : 986,027.72 = 392,231.25 : x
  2. Step 2: Convert to fraction form
    714,515.67/986,027.72 = 392,231.25/x
  3. Step 3: Cross multiply
    714,515.67x = 986,027.72 × 392,231.25
  4. Step 4: Simplify right side
    714,515.67x = 386,750,885,150.25
  5. Step 5: Solve for x
    x = 386,750,885,150.25/714,515.67
  6. Step 6: Final answer
    x = 541,276.98

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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.