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Finding the Fourth Proportional to 405,770.40, 607,853.70 and 355,906.80

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Solution

The fourth proportional to 405,770.40, 607,853.70 and 355,906.80 is: 533,156.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,770.40 : 607,853.70 = 355,906.80 : x
  2. Step 2: Convert to fraction form
    405,770.40/607,853.70 = 355,906.80/x
  3. Step 3: Cross multiply
    405,770.40x = 607,853.70 × 355,906.80
  4. Step 4: Simplify right side
    405,770.40x = 216,339,265,235.16
  5. Step 5: Solve for x
    x = 216,339,265,235.16/405,770.40
  6. Step 6: Final answer
    x = 533,156.84

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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.