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Finding the Fourth Proportional to 614,798.90, 921,214.20 and 404,190.80

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Solution

The fourth proportional to 614,798.90, 921,214.20 and 404,190.80 is: 605,639.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    614,798.90 : 921,214.20 = 404,190.80 : x
  2. Step 2: Convert to fraction form
    614,798.90/921,214.20 = 404,190.80/x
  3. Step 3: Cross multiply
    614,798.90x = 921,214.20 × 404,190.80
  4. Step 4: Simplify right side
    614,798.90x = 372,346,304,469.36
  5. Step 5: Solve for x
    x = 372,346,304,469.36/614,798.90
  6. Step 6: Final answer
    x = 605,639.18

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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.