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Finding the Fourth Proportional to 658,405.80, 987,608.70 and 445,829.40

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Solution

The fourth proportional to 658,405.80, 987,608.70 and 445,829.40 is: 668,744.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,405.80 : 987,608.70 = 445,829.40 : x
  2. Step 2: Convert to fraction form
    658,405.80/987,608.70 = 445,829.40/x
  3. Step 3: Cross multiply
    658,405.80x = 987,608.70 × 445,829.40
  4. Step 4: Simplify right side
    658,405.80x = 440,304,994,155.78
  5. Step 5: Solve for x
    x = 440,304,994,155.78/658,405.80
  6. Step 6: Final answer
    x = 668,744.10

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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.