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Finding the Fourth Proportional to 611,343.70, 917,015.55 and 168,111.70

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Solution

The fourth proportional to 611,343.70, 917,015.55 and 168,111.70 is: 252,167.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,343.70 : 917,015.55 = 168,111.70 : x
  2. Step 2: Convert to fraction form
    611,343.70/917,015.55 = 168,111.70/x
  3. Step 3: Cross multiply
    611,343.70x = 917,015.55 × 168,111.70
  4. Step 4: Simplify right side
    611,343.70x = 154,161,043,036.94
  5. Step 5: Solve for x
    x = 154,161,043,036.94/611,343.70
  6. Step 6: Final answer
    x = 252,167.55

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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.