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Finding the Fourth Proportional to 621,555.96, 857,740.98 and 345,909.20

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Solution

The fourth proportional to 621,555.96, 857,740.98 and 345,909.20 is: 477,351.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,555.96 : 857,740.98 = 345,909.20 : x
  2. Step 2: Convert to fraction form
    621,555.96/857,740.98 = 345,909.20/x
  3. Step 3: Cross multiply
    621,555.96x = 857,740.98 × 345,909.20
  4. Step 4: Simplify right side
    621,555.96x = 296,700,496,199.02
  5. Step 5: Solve for x
    x = 296,700,496,199.02/621,555.96
  6. Step 6: Final answer
    x = 477,351.22

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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.