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Finding the Fourth Proportional to 656,206.80, 905,565.20 and 354,400.80

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Solution

The fourth proportional to 656,206.80, 905,565.20 and 354,400.80 is: 489,073.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,206.80 : 905,565.20 = 354,400.80 : x
  2. Step 2: Convert to fraction form
    656,206.80/905,565.20 = 354,400.80/x
  3. Step 3: Cross multiply
    656,206.80x = 905,565.20 × 354,400.80
  4. Step 4: Simplify right side
    656,206.80x = 320,933,029,560.16
  5. Step 5: Solve for x
    x = 320,933,029,560.16/656,206.80
  6. Step 6: Final answer
    x = 489,073.00

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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.