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Finding the Fourth Proportional to 611,560.60, 917,340.90 and 190,781.80

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Solution

The fourth proportional to 611,560.60, 917,340.90 and 190,781.80 is: 286,172.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,560.60 : 917,340.90 = 190,781.80 : x
  2. Step 2: Convert to fraction form
    611,560.60/917,340.90 = 190,781.80/x
  3. Step 3: Cross multiply
    611,560.60x = 917,340.90 × 190,781.80
  4. Step 4: Simplify right side
    611,560.60x = 175,011,948,115.62
  5. Step 5: Solve for x
    x = 175,011,948,115.62/611,560.60
  6. Step 6: Final answer
    x = 286,172.70

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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.