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Finding the Fourth Proportional to 656,200.05, 905,555.88 and 354,394.05

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Solution

The fourth proportional to 656,200.05, 905,555.88 and 354,394.05 is: 489,063.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,200.05 : 905,555.88 = 354,394.05 : x
  2. Step 2: Convert to fraction form
    656,200.05/905,555.88 = 354,394.05/x
  3. Step 3: Cross multiply
    656,200.05x = 905,555.88 × 354,394.05
  4. Step 4: Simplify right side
    656,200.05x = 320,923,615,814.51
  5. Step 5: Solve for x
    x = 320,923,615,814.51/656,200.05
  6. Step 6: Final answer
    x = 489,063.69

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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.