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Finding the Fourth Proportional to 520,538.80, 782,557.80 and 443,556.40

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Solution

The fourth proportional to 520,538.80, 782,557.80 and 443,556.40 is: 666,825.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,538.80 : 782,557.80 = 443,556.40 : x
  2. Step 2: Convert to fraction form
    520,538.80/782,557.80 = 443,556.40/x
  3. Step 3: Cross multiply
    520,538.80x = 782,557.80 × 443,556.40
  4. Step 4: Simplify right side
    520,538.80x = 347,108,520,559.92
  5. Step 5: Solve for x
    x = 347,108,520,559.92/520,538.80
  6. Step 6: Final answer
    x = 666,825.45

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1.5x scale

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.