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Finding the Fourth Proportional to 621,809.60, 858,097.20 and 353,537.60

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Solution

The fourth proportional to 621,809.60, 858,097.20 and 353,537.60 is: 487,881.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,809.60 : 858,097.20 = 353,537.60 : x
  2. Step 2: Convert to fraction form
    621,809.60/858,097.20 = 353,537.60/x
  3. Step 3: Cross multiply
    621,809.60x = 858,097.20 × 353,537.60
  4. Step 4: Simplify right side
    621,809.60x = 303,369,624,654.72
  5. Step 5: Solve for x
    x = 303,369,624,654.72/621,809.60
  6. Step 6: Final answer
    x = 487,881.86

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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.