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Finding the Fourth Proportional to 515,566.40, 773,349.60 and 409,812.80

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Solution

The fourth proportional to 515,566.40, 773,349.60 and 409,812.80 is: 614,719.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,566.40 : 773,349.60 = 409,812.80 : x
  2. Step 2: Convert to fraction form
    515,566.40/773,349.60 = 409,812.80/x
  3. Step 3: Cross multiply
    515,566.40x = 773,349.60 × 409,812.80
  4. Step 4: Simplify right side
    515,566.40x = 316,928,564,954.88
  5. Step 5: Solve for x
    x = 316,928,564,954.88/515,566.40
  6. Step 6: Final answer
    x = 614,719.20

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Similar ratio
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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.