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Finding the Fourth Proportional to 520,093.80, 781,890.30 and 443,111.40

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Solution

The fourth proportional to 520,093.80, 781,890.30 and 443,111.40 is: 666,157.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,093.80 : 781,890.30 = 443,111.40 : x
  2. Step 2: Convert to fraction form
    520,093.80/781,890.30 = 443,111.40/x
  3. Step 3: Cross multiply
    520,093.80x = 781,890.30 × 443,111.40
  4. Step 4: Simplify right side
    520,093.80x = 346,464,505,479.42
  5. Step 5: Solve for x
    x = 346,464,505,479.42/520,093.80
  6. Step 6: Final answer
    x = 666,157.73

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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.