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Finding the Fourth Proportional to 690,708.89, 953,163.90 and 384,784.85

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Solution

The fourth proportional to 690,708.89, 953,163.90 and 384,784.85 is: 530,995.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,708.89 : 953,163.90 = 384,784.85 : x
  2. Step 2: Convert to fraction form
    690,708.89/953,163.90 = 384,784.85/x
  3. Step 3: Cross multiply
    690,708.89x = 953,163.90 × 384,784.85
  4. Step 4: Simplify right side
    690,708.89x = 366,763,023,521.10
  5. Step 5: Solve for x
    x = 366,763,023,521.10/690,708.89
  6. Step 6: Final answer
    x = 530,995.09

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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.