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Finding the Fourth Proportional to 520,525.80, 782,538.30 and 443,543.40

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Solution

The fourth proportional to 520,525.80, 782,538.30 and 443,543.40 is: 666,805.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,525.80 : 782,538.30 = 443,543.40 : x
  2. Step 2: Convert to fraction form
    520,525.80/782,538.30 = 443,543.40/x
  3. Step 3: Cross multiply
    520,525.80x = 782,538.30 × 443,543.40
  4. Step 4: Simplify right side
    520,525.80x = 347,089,698,212.22
  5. Step 5: Solve for x
    x = 347,089,698,212.22/520,525.80
  6. Step 6: Final answer
    x = 666,805.95

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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.