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Finding the Fourth Proportional to 440,156.80, 661,644.60 and 408,955.60

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Solution

The fourth proportional to 440,156.80, 661,644.60 and 408,955.60 is: 614,742.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,156.80 : 661,644.60 = 408,955.60 : x
  2. Step 2: Convert to fraction form
    440,156.80/661,644.60 = 408,955.60/x
  3. Step 3: Cross multiply
    440,156.80x = 661,644.60 × 408,955.60
  4. Step 4: Simplify right side
    440,156.80x = 270,583,264,379.76
  5. Step 5: Solve for x
    x = 270,583,264,379.76/440,156.80
  6. Step 6: Final answer
    x = 614,742.89

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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.