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Finding the Fourth Proportional to 661,539.38, 912,992.13 and 389,692.82

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Solution

The fourth proportional to 661,539.38, 912,992.13 and 389,692.82 is: 537,816.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,539.38 : 912,992.13 = 389,692.82 : x
  2. Step 2: Convert to fraction form
    661,539.38/912,992.13 = 389,692.82/x
  3. Step 3: Cross multiply
    661,539.38x = 912,992.13 × 389,692.82
  4. Step 4: Simplify right side
    661,539.38x = 355,786,477,777.51
  5. Step 5: Solve for x
    x = 355,786,477,777.51/661,539.38
  6. Step 6: Final answer
    x = 537,816.02

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1.5x scale

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.